Terry v. Ohio

TERRY v. OHIO, 392 U.S. 1 (1968)
392 U.S. 1

TERRY v. OHIO.
CERTIORARI TO THE SUPREME COURT OF OHIO.
No. 67.
Argued December 12, 1967.
Decided June 10, 1968.

A Cleveland detective (McFadden), on a downtown beat which he had been patrolling for many years, observed two strangers (petitioner and another man, Chilton) on a street corner. He saw them proceed alternately back and forth along an identical route, pausing to stare in the same store window, which they did for a total of about 24 times. Each completion of the route was followed by a conference between the two on a corner, at one of which they were joined by a third man (Katz) who left swiftly. Suspecting the two men of “casing a job, a stick-up,” the officer followed them and saw them rejoin the third man a couple of blocks away in front of a store. The officer approached the three, identified himself as a policeman, and asked their names. The men “mumbled something,” whereupon McFadden spun petitioner around, patted down his outside clothing, and found in his overcoat pocket, but was unable to remove, a pistol. The officer ordered the three into the store. He removed petitioner’s overcoat, took out a revolver, and ordered the three to face the wall with their hands raised. He patted down the outer clothing of Chilton and Katz and seized a revolver from Chilton’s outside overcoat pocket. He did not put his hands under the outer garments of Katz (since he discovered nothing in his pat-down which might have been a weapon), or under petitioner’s or Chilton’s outer garments until he felt the guns. The three were taken to the police station. Petitioner and Chilton were charged with carrying concealed weapons. The defense moved to suppress the weapons. Though the trial court rejected the prosecution theory that the guns had been seized during a search incident to a lawful arrest, the court denied the motion to suppress and admitted the weapons into evidence on the ground that the officer had cause to believe that petitioner and Chilton were acting suspiciously, that their interrogation was warranted, and that the officer for his own protection had the right to pat down their outer clothing having reasonable cause to believe that they might be armed. The court distinguished between an investigatory “stop” and an arrest, and between a “frisk” of the outer clothing for weapons and a full-blown search for evidence of crime. Petitioner and Chilton were found guilty, an intermediate appellate court affirmed, and the State Supreme Court dismissed the appeal on the ground that “no substantial constitutional question” was involved. Held:

1. The Fourth Amendment right against unreasonable searches and seizures, made applicable to the States by the Fourteenth Amendment, “protects people, not places,” and therefore applies as much to the citizen on the streets as well as at home or elsewhere. Pp. 8-9.

2. The issue in this case is not the abstract propriety of the police conduct but the admissibility against petitioner of the evidence uncovered by the search and seizure. P. 12.

3. The exclusionary rule cannot properly be invoked to exclude the products of legitimate and restrained police investigative techniques; and this Court’s approval of such techniques should not discourage remedies other than the exclusionary rule to curtail police abuses for which that is not an effective sanction. Pp. 13-15.

4. The Fourth Amendment applies to “stop and frisk” procedures such as those followed here. Pp. 16-20.

(a) Whenever a police officer accosts an individual and restrains his freedom to walk away, he has “seized” that personwithin the meaning of the Fourth Amendment. P. 16.

(b) A careful exploration of the outer surfaces of a person’s clothing in an attempt to find weapons is a “search” under that Amendment. P. 16.

5. Where a reasonably prudent officer is warranted in the circumstances of a given case in believing that his safety or that of others is endangered, he may make a reasonable search for weapons of the person believed by him to be armed and dangerous regardless of whether he has probable cause to arrest that individual for crime or the absolute certainty that the individual is armed. Pp. 20-27.

(a) Though the police must whenever practicable secure a warrant to make a search and seizure, that procedure cannot be followed where swift action based upon on-the-spot observations of the officer on the beat is required. P. 20.

(b) The reasonableness of any particular search and seizure must be assessed in light of the particular circumstances against the standard of whether a man of reasonable caution is warranted in believing that the action taken was appropriate. Pp. 21-22.

(c) The officer here was performing a legitimate function of investigating suspicious conduct when he decided to approach petitioner and his companions. P. 22.

(d) An officer justified in believing that an individual whose suspicious behavior he is investigating at close range is armed may, to neutralize the threat of physical harm, take necessary measures to determine whether that person is carrying a weapon. P. 24.

(e) A search for weapons in the absence of probable cause to arrest must be strictly circumscribed by the exigencies of the situation. Pp. 25-26.

(f) An officer may make an intrusion short of arrest where he has reasonable apprehension of danger before being possessed of information justifying arrest. Pp. 26-27.

6. The officer’s protective seizure of petitioner and his companions and the limited search which he made were reasonable, both at their inception and as conducted. Pp. 27-30.

(a) The actions of petitioner and his companions were consistent with the officer’s hypothesis that they were contemplating a daylight robbery and were armed. P. 28.

(b) The officer’s search was confined to what was minimally necessary to determine whether the men were armed, and the intrusion, which was made for the sole purpose of protecting himself and others nearby, was confined to ascertaining the presence of weapons. Pp. 29-30.

7. The revolver seized from petitioner was properly admitted into evidence against him, since the search which led to its seizure was reasonable under the Fourth Amendment. Pp. 30-31.

Affirmed.
Louis Stokes argued the cause for petitioner. With him on the brief was Jack G. Day.

Reuben M. Payne argued the cause for respondent. With him on the brief was John T. Corrigan.

Briefs of amici curiae, urging reversal, were filed by Jack Greenberg, James M. Nabrit III, Michael Meltsner, Melvyn Zarr, and Anthony G. Amsterdam for the NAACP Legal Defense and Educational Fund, Inc., and by Bernard A. Berkman, Melvin L. Wulf, and Alan H. Levine for the American Civil Liberties Union et al.

Briefs of amici curiae, urging affirmance, were filed by Solicitor General Griswold, Assistant Attorney General Vinson, Ralph S. Spritzer, Beatrice Rosenberg, and Mervyn Hamburg for the United States; by Louis J. Lefkowitz, pro se, Samuel A. Hirshowitz, First Assistant Attorney General, and Maria L. Marcus and Brenda Soloff, Assistant Attorneys General, for the Attorney General of New York; by Charles Moylan, Jr., Evelle J. Younger, and Harry Wood for the National District Attorneys’ Assn., and by James R. Thompson for Americans for Effective Law Enforcement.

MR. CHIEF JUSTICE WARREN delivered the opinion of the Court.

This case presents serious questions concerning the role of the Fourth Amendment in the confrontation on the street between the citizen and the policeman investigating suspicious circumstances.

Petitioner Terry was convicted of carrying a concealed weapon and sentenced to the statutorily prescribed term of one to three years in the penitentiary.Following the denial of a pretrial motion to suppress, the prosecution introduced in evidence two revolvers and a number of bullets seized from Terry and a codefendant, Richard Chilton, by Cleveland Police Detective Martin McFadden. At the hearing on the motion to suppress this evidence, Officer McFadden testified that while he was patrolling in plain clothes in downtown Cleveland at approximately 2:30 in the afternoon of October 31, 1963, his attention was attracted by two men, Chilton and Terry, standing on the corner of Huron Road and Euclid Avenue. He had never seen the two men before, and he was unable to say precisely what first drew his eye to them. However, he testified that he had been a policeman for 39 years and a detective for 35 and that he had been assigned to patrol this vicinity of downtown Cleveland for shoplifters and pickpockets for 30 years. He explained that he had developed routine habits of observation over the years and that he would “stand and watch people or walk and watch people at many intervals of the day.” He added: “Now, in this case when I looked over they didn’t look right to me at the time.”

His interest aroused, Officer McFadden took up a post of observation in the entrance to a store 300 to 400 feet away from the two men. “I get more purpose to watch them when I seen their movements,” he testified. He saw one of the men leave the other one and walk southwest on Huron Road, past some stores. The man paused for a moment and looked in a store window, then walked on a short distance, turned around and walked back toward the corner, pausing once again to look in the same store window. He rejoined his companion at the corner, and the two conferred briefly. Then the second man went through the same series of motions, strolling down Huron Road, looking in the same window, walking on a short distance, turning back, peering in the store window again, and returning to confer with the first man at the corner. The two men repeated this ritual alternately between five and six times apiece – in all, roughly a dozen trips. At one point, while the two were standing together on the corner, a third man approached them and engaged them briefly in conversation. This man then left the two others and walked west on Euclid Avenue. Chilton and Terry resumed their measured pacing, peering, and conferring. After this had gone on for 10 to 12 minutes, the two men walked off together, heading west on Euclid Avenue, following the path taken earlier by the third man.

By this time Officer McFadden had become thoroughly suspicious. He testified that after observing their elaborately casual and oft-repeated reconnaissance of the store window on Huron Road, he suspected the two men of “casing a job, a stick-up,” and that he considered it his duty as a police officer to investigate further. He added that he feared “they may have a gun.” Thus, Officer McFadden followed Chilton and Terry and saw them stop in front of Zucker’s store to talk to the same man who had conferred with them earlier on the street corner. Deciding that the situation was ripe for direct action. Officer McFadden approached the three men, identified himself as a police officer and asked for their names. At this point his knowledge was confined to what he had observed. He was not acquainted with any of the three men by name or by sight, and he had received no information concerning them from any other source. When the men “mumbled something” in response to his inquiries, Officer McFadden grabbed petitioner Terry, spun him around so that they were facing the other two, with Terry between McFadden and the others, and patted down the outside of his clothing. In the left breast pocket of Terry’s overcoat Officer McFadden felt a pistol. He reached inside the overcoat pocket, but was unable to remove the gun. At this point, keeping Terry between himself and the others, the officer ordered all three men to enter Zucker’s store. As they went in, he removed Terry’s overcoat completely, removed a .38-caliber revolver from the pocket and ordered all three men to face the wall with their hands raised. Officer McFadden proceeded to pat down the outer clothing of Chilton and the third man, Katz. He discovered another revolver in the outer pocket of Chilton’s overcoat, but no weapons were found on Katz. The officer testified that he only patted the men down to see whether they had weapons, and that he did not put his hands beneath the outer garments of either Terry or Chilton until he felt their guns. So far as appears from the record, he never placed his hands beneath Katz’ outer garments. Officer McFadden seized Chilton’s gun, asked the proprietor of the store to call a police wagon, and took all three men to the station, where Chilton and Terry were formally charged with carrying concealed weapons.

On the motion to suppress the guns the prosecution took the position that they had been seized following a search incident to a lawful arrest. The trial court rejected this theory, stating that it “would be stretching the facts beyond reasonable comprehension” to find that Officer McFadden had had probable cause to arrest the men before he patted them down for weapons. However, the court denied the defendants’ motion on the ground that Officer McFadden, on the basis of his experience, “had reasonable cause to believe . . . that the defendants were conducting themselves suspiciously, and some interrogation should be made of their action.” Purely for his own protection, the court held, the officer had the right to pat down the outer clothing of these men, who he had reasonable cause to believe might be armed. The court distinguished between an investigatory “stop” and an arrest, and between a “frisk” of the outer clothing for weapons and a full-blown search for evidence of crime. The frisk, it held, was essential to the proper performance of the officer’s investigatory duties, for without it “the answer to the police officer may be a bullet, and a loaded pistol discovered during the frisk is admissible.”

After the court denied their motion to suppress, Chilton and Terry waived jury trial and pleaded not guilty. The court adjudged them guilty, and the Court of Appeals for the Eighth Judicial District, Cuyahoga County, affirmed. State v. Terry, 5 Ohio App. 2d 122, 214 N. E. 2d 114 (1966). The Supreme Court of Ohio dismissed their appeal on the ground that no “substantial constitutional question” was involved. We granted certiorari, 387 U.S. 929 (1967), to determine whether the admission of the revolvers in evidence violated petitioner’s rights under the Fourth Amendment, made applicable to the States by the Fourteenth. Mapp v. Ohio, 367 U.S. 643(1961). We affirm the conviction.

I.
The Fourth Amendment provides that “the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated . . . .” This inestimable right of personal security belongs as much to the citizen on the streets of our cities as to the homeowner closeted in his study to dispose of his secret affairs. For, as this Court has always recognized,

“No right is held more sacred, or is more carefully guarded, by the common law, than the right of every individual to the possession and control of his own person, free from all restraint or interference of others, unless by clear and unquestionable authority of law.” Union Pac. R. Co. v. Botsford, 141 U.S. 250, 251 (1891).

We have recently held that “the Fourth Amendment protects people, not places,” Katz v. United States, 389 U.S. 347, 351 (1967), and wherever an individual may harbor a reasonable “expectation of privacy,” id., at 361 (MR. JUSTICE HARLAN, concurring), he is entitled to be free from unreasonable governmental intrusion. Of course, the specific content and incidents of this right must be shaped by the context in which it is asserted. For “what the Constitution forbids is not all searches and seizures, but unreasonable searches and seizures.” Elkins v. United States, 364 U.S. 206, 222 (1960). Unquestionably petitioner was entitled to the protection of the Fourth Amendment as he walked down the street in Cleveland. Beck v. Ohio, 379 U.S. 89 (1964); Rios v. United States,364 U.S. 253 (1960); Henry v. United States, 361 U.S. 98 (1959); United States v. Di Re, 332 U.S. 581 (1948); Carroll v. United States, 267 U.S. 132 (1925). The question is whether in all the circumstances of this on-the-street encounter, his right to personal security was violated by an unreasonable search and seizure.
We would be less than candid if we did not acknowledge that this question thrusts to the fore difficult and troublesome issues regarding a sensitive area of police activity – issues which have never before been squarely presented to this Court. Reflective of the tensions involved are the practical and constitutional arguments pressed with great vigor on both sides of the public debate over the power of the police to “stop and frisk” – as it is sometimes euphemistically termed – suspicious persons.

On the one hand, it is frequently argued that in dealing with the rapidly unfolding and often dangerous situations on city streets the police are in need of an escalating set of flexible responses, graduated in relation to the amount of information they possess. For this purpose it is urged that distinctions should be made between a “stop” and an “arrest” (or a “seizure” of a person), and between a “frisk” and a “search.” Thus, it is argued, the police should be allowed to “stop” a person and detain him briefly for questioning upon suspicion that he may be connected with criminal activity. Upon suspicion that the person may be armed, the police should have the power to “frisk” him for weapons. If the “stop” and the “frisk” give rise to probable cause to believe that the suspect has committed a crime, then the police should be empowered to make a formal “arrest,” and a full incident “search” of the person. This scheme is justified in part upon the notion that a “stop” and a “frisk” amount to a mere “minor inconvenience and petty indignity,” which can properly be imposed upon the citizen in the interest of effective law enforcement on the basis of a police officer’s suspicion.

On the other side the argument is made that the authority of the police must be strictly circumscribed by the law of arrest and search as it has developed to date in the traditional jurisprudence of the Fourth Amendment. It is contended with some force that there is not – and cannot be – a variety of police activity which does not depend solely upon the voluntary cooperation of the citizen and yet which stops short of an arrest based upon probable cause to make such an arrest. The heart of the Fourth Amendment, the argument runs, is a severe requirement of specific justification for any intrusion upon protected personal security, coupled with a highly developed system of judicial controls to enforce upon the agents of the State the commands of the Constitution. Acquiescence by the courts in the compulsion inherent in the field interrogation practices at issue here, it is urged, would constitute an abdication of judicial control over, and indeed an encouragement of, substantial interference with liberty and personal security by police officers whose judgment is necessarily colored by their primary involvement in “the often competitive enterprise of ferreting out crime.” Johnson v. United States, 333 U.S. 10, 14 (1948). This, it is argued, can only serve to exacerbate police-community tensions in the crowded centers of our Nation’s cities.

In this context we approach the issues in this case mindful of the limitations of the judicial function in controlling the myriad daily situations in which policemen and citizens confront each other on the street. The State has characterized the issue here as “the right of a police officer . . . to make an on-the-street stop, interrogate and pat down for weapons (known in street vernacular as `stop and frisk’).” But this is only partly accurate. For the issue is not the abstract propriety of the police conduct, but the admissibility against petitioner of the evidence uncovered by the search and seizure. Ever since its inception, the rule excluding evidence seized in violation of the Fourth Amendment has been recognized as a principal mode of discouraging lawless police conduct. See Weeks v. United States, 232 U.S. 383, 391 -393 (1914). Thus its major thrust is a deterrent one, see Linkletter v. Walker, 381 U.S. 618, 629 -635 (1965), and experience has taught that it is the only effective deterrent to police misconduct in the criminal context, and that without it the constitutional guarantee against unreasonable searches and seizures would be a mere “form of words.” Mapp v. Ohio, 367 U.S. 643, 655 (1961). The rule also serves another vital function – “the imperative of judicial integrity.” Elkins v. United States, 364 U.S. 206, 222 (1960). Courts which sit under our Constitution cannot and will not be made party to lawless invasions of the constitutional rights of citizens by permitting unhindered governmental use of the fruits of such invasions. Thus in our system evidentiary rulings provide the context in which the judicial process of inclusion and exclusion approves some conduct as comporting with constitutional guarantees and disapproves other actions by state agents. A ruling admitting evidence in a criminal trial, we recognize, has the necessary effect of legitimizing the conduct which produced the evidence, while an application of the exclusionary rule withholds the constitutional imprimatur.

The exclusionary rule has its limitations, however, as a tool of judicial control. It cannot properly be invoked to exclude the products of legitimate police investigative techniques on the ground that much conduct which is closely similar involves unwarranted intrusions upon constitutional protections. Moreover, in some contexts the rule is ineffective as a deterrent. Street encounters between citizens and police officers are incredibly rich in diversity. They range from wholly friendly exchanges of pleasantries or mutually useful information to hostile confrontations of armed men involving arrests, or injuries, or loss of life. Moreover, hostile confrontations are not all of a piece. Some of them begin in a friendly enough manner, only to take a different turn upon the injection of some unexpected element into the conversation. Encounters are initiated by the police for a wide variety of purposes, some of which are wholly unrelated to a desire to prosecute for crime. Doubtless some police “field interrogation” conduct violates the Fourth Amendment. But a stern refusal by this Court to condone such activity does not necessarily render it responsive to the exclusionary rule. Regardless of how effective the rule may be where obtaining convictions is an important objective of the police, it is powerless to deter invasions of constitutionally guaranteed rights where the police either have no interest in prosecuting or are willing to forgo successful prosecution in the interest of serving some other goal.

Proper adjudication of cases in which the exclusionary rule is invoked demands a constant awareness of these limitations. The wholesale harassment by certain elements of the police community, of which minority groups, particularly Negroes, frequently complain, will not be stopped by the exclusion of any evidence from any criminal trial. Yet a rigid and unthinking application of the exclusionary rule, in futile protest against practices which it can never be used effectively to control, may exact a high toll in human injury and frustration of efforts to prevent crime. No judicial opinion can comprehend the protean variety of the street encounter, and we can only judge the facts of the case before us. Nothing we say today is to be taken as indicating approval of police conduct outside the legitimate investigative sphere. Under our decision, courts still retain their traditional responsibility to guard against police conduct which is overbearing or harassing, or which trenches upon personal security without the objective evidentiary justification which the Constitution requires. When such conduct is identified, it must be condemned by the judiciary and its fruits must be excluded from evidence in criminal trials. And, of course, our approval of legitimate and restrained investigative conduct undertaken on the basis of ample factual justification should in no way discourage the employment of other remedies than the exclusionary rule to curtail abuses for which that sanction may prove inappropriate.

Having thus roughly sketched the perimeters of the constitutional debate over the limits on police investigative conduct in general and the background against which this case presents itself, we turn our attention to the quite narrow question posed by the facts before us: whether it is always unreasonable for a policeman to seize a person and subject him to a limited search for weapons unless there is probable cause for an arrest. Given the narrowness of this question, we have no occasion to canvass in detail the constitutional limitations upon the scope of a policeman’s power when he confronts a citizen without probable cause to arrest him.

II.
Our first task is to establish at what point in this encounter the Fourth Amendment becomes relevant. That is, we must decide whether and when Officer McFadden “seized” Terry and whether and when he conducted a “search.” There is some suggestion in the use of such terms as “stop” and “frisk” that such police conduct is outside the purview of the Fourth Amendment because neither action rises to the level of a “search” or “seizure” within the meaning of the Constitution. We emphatically reject this notion. It is quite plain that the Fourth Amendment governs “seizures” of the person which do not eventuate in a trip to the station house and prosecution for crime – “arrests” in traditional terminology. It must be recognized that whenever a police officer accosts an individual and restrains his freedom to walk away, he has “seized” that person. And it is nothing less than sheer torture of the English language to suggest that a careful exploration of the outer surfaces of a person’s clothing all over his or her body in an attempt to find weapons is not a “search.” Moreover, it is simply fantastic to urge that such a procedure performed in public by a policeman while the citizen stands helpless, perhaps facing a wall with his hands raised, is a “petty indignity.” It is a serious intrusion upon the sanctity of the person, which may inflict great indignity and arouse strong resentment, and it is not to be undertaken lightly.

The danger in the logic which proceeds upon distinctions between a “stop” and an “arrest,” or “seizure” of the person, and between a “frisk” and a “search” is two-fold. It seeks to isolate from constitutional scrutiny the initial stages of the contact between the policeman and the citizen. And by suggesting a rigid all-or-nothing model of justification and regulation under the Amendment, it obscures the utility of limitations upon the scope, as well as the initiation, of police action as a means of constitutional regulation. This Court has held in the past that a search which is reasonable at its inception may violate the Fourth Amendment by virtue of its intolerable intensity and scope. Kremen v. United States, 353 U.S. 346 (1957); Go-Bart Importing Co. v. United States, 282 U.S. 344, 356 -358 (1931); see United States v. Di Re, 332 U.S. 581, 586 -587 (1948). The scope of the search must be “strictly tied to and justified by” the circumstances which rendered its initiation permissible. Warden v. Hayden, 387 U.S. 294, 310 (1967) (MR. JUSTICE FORTAS, concurring); see, e. g., Preston v. United States, 376 U.S. 364, 367 -368 (1964); Agnello v. United States, 269 U.S. 20, 30 -31 (1925).

The distinctions of classical “stop-and-frisk” theory thus serve to divert attention from the central inquiry under the Fourth Amendment – the reasonableness in all the circumstances of the particular governmental invasion of a citizen’s personal security. “Search” and “seizure” are not talismans. We therefore reject the notions that the Fourth Amendment does not come into play at all as a limitation upon police conduct if the officers stop short of something called a “technical arrest” or a “full-blown search.”

In this case there can be no question, then, that Officer McFadden “seized” petitioner and subjected him to a “search” when he took hold of him and patted down the outer surfaces of his clothing. We must decide whether at that point it was reasonable for Officer McFadden to have interfered with petitioner’s personal security as he did. And in determining whether the seizure and search were “unreasonable” our inquiry is a dual one – whether the officer’s action was justified at its inception, and whether it was reasonably related in scope to the circumstances which justified the interference in the first place.

III.
If this case involved police conduct subject to the Warrant Clause of the Fourth Amendment, we would have to ascertain whether “probable cause” existed to justify the search and seizure which took place. However, that is not the case. We do not retreat from our holdings that the police must, whenever practicable, obtain advance judicial approval of searches and seizures through the warrant procedure, see, e. g., Katz v. United States, 389 U.S. 347 (1967); Beck v. Ohio, 379 U.S. 89, 96 (1964); Chapman v. United States, 365 U.S. 610 (1961), or that in most instances failure to comply with the warrant requirement can only be excused by exigent circumstances, see, e. g., Warden v. Hayden, 387 U.S. 294 (1967) (hot pursuit); cf. Preston v. United States, 376 U.S. 364, 367 -368 (1964). But we deal here with an entire rubric of police conduct – necessarily swift action predicated upon the on-the-spot observations of the officer on the beat – which historically has not been, and as a practical matter could not be, subjected to the warrant procedure. Instead, the conduct involved in this case must be tested by the Fourth Amendment’s general proscription against unreasonable searches and seizures.

Nonetheless, the notions which underlie both the warrant procedure and the requirement of probable cause remain fully relevant in this context. In order to assess the reasonableness of Officer McFadden’s conduct as a general proposition, it is necessary “first to focus upon the governmental interest which allegedly justifies official intrusion upon the constitutionally protected interests of the private citizen,” for there is “no ready test for determining reasonableness other than by balancing the need to search [or seize] against the invasion which the search [or seizure] entails.” Camara v. Municipal Court, 387 U.S. 523, 534 -535, 536-537 (1967). And in justifying the particular intrusion the police officer must be able to point to specific and articulable facts which, taken together with rational inferences from those facts, reasonably warrant that intrusion. The scheme of the Fourth Amendment becomes meaningful only when it is assured that at some point the conduct of those charged with enforcing the laws can be subjected to the more detached, neutral scrutiny of a judge who must evaluate the reasonableness of a particular search or seizure in light of the particular circumstances. And in making that assessment it is imperative that the facts be judged against an objective standard: would the facts available to the officer at the moment of the seizure or the search “warrant a man of reasonable caution in the belief” that the action taken was appropriate? Cf. Carroll v. United States, 267 U.S. 132 (1925); Beck v. Ohio, 379 U.S. 89, 96 -97 (1964). Anything less would invite intrusions upon constitutionally guaranteed rights based on nothing more substantial than inarticulate hunches, a result this Court has consistently refused to sanction. See, e. g., Beck v. Ohio, supra; Rios v. United States, 364 U.S. 253 (1960); Henry v. United States, 361 U.S. 98 (1959). And simple “`good faith on the part of the arresting officer is not enough.’ . . . If subjective good faith alone were the test, the protections of the Fourth Amendment would evaporate, and the people would be `secure in their persons, houses, papers, and effects,’ only in the discretion of the police.” Beck v. Ohio, supra, at 97.

Applying these principles to this case, we consider first the nature and extent of the governmental interests involved. One general interest is of course that of effective crime prevention and detection; it is this interest which underlies the recognition that a police officer may in appropriate circumstances and in an appropriate manner approach a person for purposes of investigating possibly criminal behavior even though there is no probable cause to make an arrest. It was this legitimate investigative function Officer McFadden was discharging when he decided to approach petitioner and his companions. He had observed Terry, Chilton, and Katz go through a series of acts, each of them perhaps innocent in itself, but which taken together warranted further investigation. There is nothing unusual in two men standing together on a street corner, perhaps waiting for someone. Nor is there anything suspicious about people in such circumstances strolling up and down the street, singly or in pairs. Store windows, moreover, are made to be looked in. But the story in quite different where, as here, two men hover about a street corner for an extended period of time, at the end of which it becomes apparent that they are not waiting for anyone or anything; where these men pace alternately along an identical route, pausing to stare in the same store window roughly 24 times; where each completion of this route is followed immediately by a conference between the two men on the corner; where they are joined in one of these conferences by a third man who leaves swiftly; and where the two men finally follow the third and rejoin him a couple of blocks away. It would have been poor police work indeed for an officer of 30 years’ experience in the detection of thievery from stores in this same neighborhood to have failed to investigate this behavior further.

The crux of this case, however, is not the propriety of Officer McFadden’s taking steps to investigate petitioner’s suspicious behavior, but rather, whether there was justification for McFadden’s invasion of Terry’s personal security by searching him for weapons in the course of that investigation. We are now concerned with more than the governmental interest in investigating crime; in addition, there is the more immediate interest of the police officer in taking steps to assure himself that the person with whom he is dealing is not armed with a weapon that could unexpectedly and fatally be used against him. Certainly it would be unreasonable to require that police officers take unnecessary risks in the performance of their duties. American criminals have a long tradition of armed violence, and every year in this country many law enforcement officers are killed in the line of duty, and thousands more are wounded. Virtually all of these deaths and a substantial portion of the injuries are inflicted with guns and knives.

In view of these facts, we cannot blind ourselves to the need for law enforcement officers to protect themselves and other prospective victims of violence in situations where they may lack probable cause for an arrest. When an officer is justified in believing that the individual whose suspicious behavior he is investigating at close range is armed and presently dangerous to the officer or to others, it would appear to be clearly unreasonable to deny the officer the power to take necessary measures to determine whether the person is in fact carrying a weapon and to neutralize the threat of physical harm.

We must still consider, however, the nature and quality of the intrusion on individual rights which must be accepted if police officers are to be conceded the right to search for weapons in situations where probable cause to arrest for crime is lacking. Even a limited search of the outer clothing for weapons constitutes a severe, though brief, intrusion upon cherished personal security, and it must surely be an annoying, frightening, and perhaps humiliating experience. Petitioner contends that such an intrusion is permissible only incident to a lawful arrest, either for a crime involving the possession of weapons or for a crime the commission of which led the officer to investigate in the first place. However, this argument must be closely examined.

Petitioner does not argue that a police officer should refrain from making any investigation of suspicious circumstances until such time as he has probable cause to make an arrest; nor does he deny that police officers in properly discharging their investigative function may find themselves confronting persons who might well be armed and dangerous. Moreover, he does not say that an officer is always unjustified in searching a suspect to discover weapons. Rather, he says it is unreasonable for the policeman to take that step until such time as the situation evolves to a point where there is probable cause to make an arrest. When that point has been reached, petitioner would concede the officer’s right to conduct a search of the suspect for weapons, fruits or instrumentalities of the crime, or “mere” evidence, incident to the arrest.

There are two weaknesses in this line of reasoning, however. First, it fails to take account of traditional limitations upon the scope of searches, and thus recognizes no distinction in purpose, character, and extent between a search incident to an arrest and a limited search for weapons. The former, although justified in part by the acknowledged necessity to protect the arresting officer from assault with a concealed weapon, Preston v. United States, 376 U.S. 364, 367 (1964), is also justified on other grounds, ibid., and can therefore involve a relatively extensive exploration of the person. A search for weapons in the absence of probable cause to arrest, however, must, like any other search, be strictly circumscribed by the exigencies which justify its initiation. Warden v. Hayden, 387 U.S. 294, 310 (1967) (MR. JUSTICE FORTAS, concurring). Thus it must be limited to that which is necessary for the discovery of weapons which might be used to harm the officer or others nearby, and may realistically be characterized as something less than a “full” search, even though it remains a serious intrusion.

A second, and related, objection to petitioner’s argument is that it assumes that the law of arrest has already worked out the balance between the particular interests involved here – the neutralization of danger to the policeman in the investigative circumstance and the sanctity of the individual. But this is not so. An arrest is a wholly different kind of intrusion upon individual freedom from a limited search for weapons, and the interests each is designed to serve are likewise quite different. An arrest is the initial stage of a criminal prosecution. It is intended to vindicate society’s interest in having its laws obeyed, and it is inevitably accompanied by future interference with the individual’s freedom of movement, whether or not trial or conviction ultimately follows. The protective search for weapons, on the other hand, constitutes a brief, though far from inconsiderable, intrusion upon the sanctity of the person. It does not follow that because an officer may lawfully arrest a person only when he is apprised of facts sufficient to warrant a belief that the person has committed or is committing a crime, the officer is equally unjustified, absent that kind of evidence, in making any intrusions short of an arrest. Moreover, a perfectly reasonable apprehension of danger may arise long before the officer is possessed of adequate information to justify taking a person into custody for the purpose of prosecuting him for a crime. Petitioner’s reliance on cases which have worked out standards of reasonableness with regard to “seizures” constituting arrests and searches incident thereto is thus misplaced. It assumes that the interests sought to be vindicated and the invasions of personal security may be equated in the two cases, and thereby ignores a vital aspect of the analysis of the reasonableness of particular types of conduct under the Fourth Amendment. See Camara v. Municipal Court, supra.

Our evaluation of the proper balance that has to be struck in this type of case leads us to conclude that there must be a narrowly drawn authority to permit a reasonable search for weapons for the protection of the police officer, where he has reason to believe that he is dealing with an armed and dangerous individual, regardless of whether he has probable cause to arrest the individual for a crime. The officer need not be absolutely certain that the individual is armed; the issue is whether a reasonably prudent man in the circumstances would be warranted in the belief that his safety or that of others was in danger. Cf. Beck v. Ohio, 379 U.S. 89, 91 (1964); Brinegar v. United States, 338 U.S. 160, 174 -176 (1949); Stacey v. Emery, 97 U.S. 642, 645 (1878). And in determining whether the officer acted reasonably in such circumstances, due weight must be given, not to his inchoate and unparticularized suspicion or “hunch,” but to the specific reasonable inferences which he is entitled to draw from the facts in light of his experience. Cf. Brinegar v. United States supra.

IV.
We must now examine the conduct of Officer McFadden in this case to determine whether his search and seizure of petitioner were reasonable, both at their inception and as conducted. He had observed Terry, together with Chilton and another man, acting in a manner he took to be preface to a “stick-up.” We think on the facts and circumstances Officer McFadden detailed before the trial judge a reasonably prudent man would have been warranted in believing petitioner was armed and thus presented a threat to the officer’s safety while he was investigating his suspicious behavior. The actions of Terry and Chilton were consistent with McFadden’s hypothesis that these men were contemplating a daylight robbery – which, it is reasonable to assume, would be likely to involve the use of weapons – and nothing in their conduct from the time he first noticed them until the time he confronted them and identified himself as a police officer gave him sufficient reason to negate that hypothesis. Although the trio had departed the original scene, there was nothing to indicate abandonment of an intent to commit a robbery at some point. Thus, when Officer McFadden approached the three men gathered before the display window at Zucker’s store he had observed enough to make it quite reasonable to fear that they were armed; and nothing in their response to his hailing them, identifying himself as a police officer, and asking their names served to dispel that reasonable belief. We cannot say his decision at that point to seize Terry and pat his clothing for weapons was the product of a volatile or inventive imagination, or was undertaken simply as an act of harassment; the record evidences the tempered act of a policeman who in the course of an investigation had to make a quick decision as to how to protect himself and others from possible danger, and took limited steps to do so.

The manner in which the seizure and search were conducted is, of course, as vital a part of the inquiry as whether they were warranted at all. The Fourth Amendment proceeds as much by limitations upon the scope of governmental action as by imposing preconditions upon its initiation. Compare Katz v. United States, 389 U.S. 347, 354 -356 (1967). The entire deterrent purpose of the rule excluding evidence seized in violation of the Fourth Amendment rests on the assumption that “limitations upon the fruit to be gathered tend to limit the quest itself.” United States v. Poller, 43 F.2d 911, 914 (C. A. 2d Cir. 1930); see, e. g., Linkletter v. Walker, 381 U.S. 618, 629 -635 (1965); Mapp v. Ohio, 367 U.S. 643 (1961); Elkins v. United States, 364 U.S. 206, 216 -221 (1960). Thus, evidence may not be introduced if it was discovered by means of a seizure and search which were not reasonably related in scope to the justification for their initiation. Warden v. Hayden,387 U.S. 294, 310 (1967) (MR. JUSTICE FORTAS, concurring).

We need not develop at length in this case, however, the limitations which the Fourth Amendment places upon a protective seizure and search for weapons. These limitations will have to be developed in the concrete factual circumstances of individual cases. See Sibron v. New York, post, p. 40, decided today. Suffice it to note that such a search, unlike a search without a warrant incident to a lawful arrest, is not justified by any need to prevent the disappearance or destruction of evidence of crime. See Preston v. United States, 376 U.S. 364, 367 (1964). The sole justification of the search in the present situation is the protection of the police officer and others nearby, and it must therefore be confined in scope to an intrusion reasonably designed to discover guns, knives, clubs, or other hidden instruments for the assault of the police officer.

The scope of the search in this case presents no serious problem in light of these standards. Officer McFadden patted down the outer clothing of petitioner and his two companions. He did not place his hands in their pockets or under the outer surface of their garments until he had felt weapons, and then he merely reached for and removed the guns. He never did invade Katz’ person beyond the outer surfaces of his clothes, since he discovered nothing in his pat-down which might have been a weapon. Officer McFadden confined his search strictly to what was minimally necessary to learn whether the men were armed and to disarm them once he discovered the weapons. He did not conduct a general exploratory search for whatever evidence of criminal activity he might find.

V.
We conclude that the revolver seized from Terry was properly admitted in evidence against him. At the time he seized petitioner and searched him for weapons, Officer McFadden had reasonable grounds to believe that petitioner was armed and dangerous, and it was necessary for the protection of himself and others to take swift measures to discover the true facts and neutralize the threat of harm if it materialized. The policeman carefully restricted his search to what was appropriate to the discovery of the particular items which he sought. Each case of this sort will, of course, have to be decided on its own facts. We merely hold today that where a police officer observes unusual conduct which leads him reasonably to conclude in light of his experience that criminal activity may be afoot and that the persons with whom he is dealing may be armed and presently dangerous, where in the course of investigating this behavior he identifies himself as a policeman and makes reasonable inquiries, and where nothing in the initial stages of the encounter serves to dispel his reasonable fear for his own or others’ safety, he is entitled for the protection of himself and others in the area to conduct a carefully limited search of the outer clothing of such persons in an attempt to discover weapons which might be used to assault him. Such a search is a reasonable search under the Fourth Amendment, and any weapons seized may properly be introduced in evidence against the person from whom they were taken.

Affirmed.

MR. JUSTICE BLACK concurs in the judgment and the opinion except where the opinion quotes from and relies upon this Court’s opinion in Katz v. United States and the concurring opinion in Warden v. Hayden.

MR. JUSTICE HARLAN, concurring.

While I unreservedly agree with the Court’s ultimate holding in this case, I am constrained to fill in a few gaps, as I see them, in its opinion. I do this because what is said by this Court today will serve as initial guidelines for law enforcement authorities and courts throughout the land as this important new field of law develops.

A police officer’s right to make an on-the-street “stop” and an accompanying “frisk” for weapons is of course bounded by the protections afforded by the Fourth and Fourteenth Amendments. The Court holds, and I agree, that while the right does not depend upon possession by the officer of a valid warrant, nor upon the existence of probable cause, such activities must be reasonable under the circumstances as the officer credibly relates them in court. Since the question in this and most cases is whether evidence produced by a frisk is admissible, the problem is to determine what makes a frisk reasonable.

If the State of Ohio were to provide that police officers could, on articulable suspicion less than probable cause, forcibly frisk and disarm persons thought to be carrying concealed weapons, I would have little doubt that action taken pursuant to such authority could be constitutionally reasonable. Concealed weapons create an immediate [392 U.S. 1, 32] and severe danger to the public, and though that danger might not warrant routine general weapons checks, it could well warrant action on less than a “probability.” I mention this line of analysis because I think it vital to point out that it cannot be applied in this case. On the record before us Ohio has not clothed its policemen with routine authority to frisk and disarm on suspicion; in the absence of state authority, policemen have no more right to “pat down” the outer clothing of passers-by, or of persons to whom they address casual questions, than does any other citizen. Consequently, the Ohio courts did not rest the constitutionality of this frisk upon any general authority in Officer McFadden to take reasonable steps to protect the citizenry, including himself, from dangerous weapons.

The state courts held, instead, that when an officer is lawfully confronting a possibly hostile person in the line of duty he has a right, springing only from the necessity of the situation and not from any broader right to disarm, to frisk for his own protection. This holding, with which I agree and with which I think the Court agrees, offers the only satisfactory basis I can think of for affirming this conviction. The holding has, however, two logical corollaries that I do not think the Court has fully expressed.

In the first place, if the frisk is justified in order to protect the officer during an encounter with a citizen, the officer must first have constitutional grounds to insist on an encounter, to make a forcible stop. Any person, including a policeman, is at liberty to avoid a person he considers dangerous. If and when a policeman has a right instead to disarm such a person for his own protection, he must first have a right not to avoid him but to be in his presence. That right must be more than the liberty (again, possessed by every citizen) to address questions to other persons, for ordinarily the person [392 U.S. 1, 33] addressed has an equal right to ignore his interrogator and walk away; he certainly need not submit to a frisk for the questioner’s protection. I would make it perfectly clear that the right to frisk in this case depends upon the reasonableness of a forcible stop to investigate a suspected crime.

Where such a stop is reasonable, however, the right to frisk must be immediate and automatic if the reason for the stop is, as here, an articulable suspicion of a crime of violence. Just as a full search incident to a lawful arrest requires no additional justification, a limited frisk incident to a lawful stop must often be rapid and routine. There is no reason why an officer, rightfully but forcibly confronting a person suspected of a serious crime, should have to ask one question and take the risk that the answer might be a bullet.

The facts of this case are illustrative of a proper stop and an incident frisk. Officer McFadden had no probable cause to arrest Terry for anything, but he had observed circumstances that would reasonably lead an experienced, prudent policeman to suspect that Terry was about to engage in burglary or robbery. His justifiable suspicion afforded a proper constitutional basis for accosting Terry, restraining his liberty of movement briefly, and addressing questions to him, and Officer McFadden did so. When he did, he had no reason whatever to suppose that Terry might be armed, apart from the fact that he suspected him of planning a violent crime. McFadden asked Terry his name, to which Terry “mumbled something.” Whereupon McFadden, without asking Terry to speak louder and without giving him any chance to explain his presence or his actions, forcibly frisked him.

I would affirm this conviction for what I believe to be the same reasons the Court relies on. I would, however, make explicit what I think is implicit in affirmance on [392 U.S. 1, 34] the present facts. Officer McFadden’s right to interrupt Terry’s freedom of movement and invade his privacy arose only because circumstances warranted forcing an encounter with Terry in an effort to prevent or investigate a crime. Once that forced encounter was justified, however, the officer’s right to take suitable measures for his own safety followed automatically.

Upon the foregoing premises, I join the opinion of the Court.

MR. JUSTICE WHITE, concurring.

I join the opinion of the Court, reserving judgment, however, on some of the Court’s general remarks about the scope and purpose of the exclusionary rule which the Court has fashioned in the process of enforcing the Fourth Amendment.

Also, although the Court puts the matter aside in the context of this case, I think an additional word is in order concerning the matter of interrogation during an investigative stop. There is nothing in the Constitution which prevents a policeman from addressing questions to anyone on the streets. Absent special circumstances, the person approached may not be detained or frisked but may refuse to cooperate and go on his way. However, given the proper circumstances, such as those in this case, it seems to me the person may be briefly detained against his will while pertinent questions are directed to him. Of course, the person stopped is not obliged to answer, answers may not be compelled, and refusal to answer furnishes no basis for an arrest, although it may alert the officer to the need for continued observation. In my view, it is temporary detention, warranted by the circumstances, which chiefly justifies the protective frisk for weapons. Perhaps the frisk itself, where proper, will have beneficial results whether questions are asked or not. If weapons are found, an arrest will follow. [392 U.S. 1, 35] If none are found, the frisk may nevertheless serve preventive ends because of its unmistakable message that suspicion has been aroused. But if the investigative stop is sustainable at all, constitutional rights are not necessarily violated if pertinent questions are asked and the person is restrained briefly in the process.

MR. JUSTICE DOUGLAS, dissenting.

I agree that petitioner was “seized” within the meaning of the Fourth Amendment. I also agree that frisking petitioner and his companions for guns was a “search.” But it is a mystery how that “search” and that “seizure” can be constitutional by Fourth Amendment standards, unless there was “probable cause to believe that (1) a crime had been committed or (2) a crime was in the process of being committed or (3) a crime was about to be committed.

The opinion of the Court disclaims the existence of “probable cause.” If loitering were in issue and that [392 U.S. 1, 36] was the offense charged, there would be “probable cause” shown. But the crime here is carrying concealed weapons; 2 and there is no basis for concluding that the officer had “probable cause” for believing that that crime was being committed. Had a warrant been sought, a magistrate would, therefore, have been unauthorized to issue one, for he can act only if there is a showing of “probable cause.” We hold today that the police have greater authority to make a “seizure” and conduct a “search” than a judge has to authorize such action. We have said precisely the opposite over and over again. 3 [392 U.S. 1, 37]

In other words, police officers up to today have been permitted to effect arrests or searches without warrants only when the facts within their personal knowledge would satisfy the constitutional standard of probable cause. At the time of their “seizure” without a warrant they must possess facts concerning the person arrested that would have satisfied a magistrate that “probable cause” was indeed present. The term “probable cause” rings a bell of certainty that is not sounded by phrases such as “reasonable suspicion.” Moreover, the meaning of “probable cause” is deeply imbedded in our constitutional history. As we stated in Henry v. United States, 361 U.S. 98, 100 -102:

“The requirement of probable cause has roots that are deep in our history. The general warrant, in which the name of the person to be arrested was left blank, and the writs of assistance, against which James Otis inveighed, both perpetuated the oppressive practice of allowing the police to arrest and search on suspicion. Police control took the place of judicial control, since no showing of `probable cause’ before a magistrate was required.

. . . . .
“That philosophy [rebelling against these practices] later was reflected in the Fourth Amendment. And as the early American decisions both before and immediately after its adoption show, common rumor or report, suspicion, or even `strong reason to suspect’ was not adequate to support a warrant [392 U.S. 1, 38] for arrest. And that principle has survived to this day. . . .
“. . . It is important, we think, that this requirement [of probable cause] be strictly enforced, for the standard set by the Constitution protects both the officer and the citizen. If the officer acts with probable cause, he is protected even though it turns out that the citizen is innocent. . . . And while a search without a warrant is, within limits, permissible if incident to a lawful arrest, if an arrest without a warrant is to support an incidental search, it must be made with probable cause. . . . This immunity of officers cannot fairly be enlarged without jeopardizing the privacy or security of the citizen.”

The infringement on personal liberty of any “seizure” of a person can only be “reasonable” under the Fourth Amendment if we require the police to possess “probable cause” before they seize him. Only that line draws a meaningful distinction between an officer’s mere inkling and the presence of facts within the officer’s personal knowledge which would convince a reasonable man that the person seized has committed, is committing, or is about to commit a particular crime. “In dealing with probable cause, . . . as the very name implies, we deal with probabilities. These are not technical; they are the factual and practical considerations of everyday life on which reasonable and prudent men, not legal technicians, act.” Brinegar v. United States, 338 U.S. 160, 175 .
To give the police greater power than a magistrate is to take a long step down the totalitarian path. Perhaps such a step is desirable to cope with modern forms of lawlessness. But if it is taken, it should be the deliberate choice of the people through a constitutional amendment. [392 U.S. 1, 39] Until the Fourth Amendment, which is closely allied with the Fifth, 4 is rewritten, the person and the effects of the individual are beyond the reach of all government agencies until there are reasonable grounds to believe (probable cause) that a criminal venture has been launched or is about to be launched.

There have been powerful hydraulic pressures throughout our history that bear heavily on the Court to water down constitutional guarantees and give the police the upper hand. That hydraulic pressure has probably never been greater than it is today.

Yet if the individual is no longer to be sovereign, if the police can pick him up whenever they do not like the cut of his jib, if they can “seize” and “search” him in their discretion, we enter a new regime. The decision to enter it should be made only after a full debate by the people of this country.

Michigan v. Long

MICHIGAN v. LONG, 463 U.S. 1032 (1983)
463 U.S. 1032
MICHIGAN v. LONG
CERTIORARI TO THE SUPREME COURT OF MICHIGAN
No. 82-256.
Argued February 23, 1983
Decided July 6, 1983

Two police officers, patrolling in a rural area at night, observed a car traveling erratically and at excessive speed. When the car swerved into a ditch, the officers stopped to investigate and were met by respondent, the only occupant of the car, at the rear of the car. Respondent, who “appeared to be under the influence of something,” did not respond to initial requests to produce his license and registration, and when he began walking toward the open door of the car, apparently to obtain the registration, the officers followed him and saw a hunting knife on the floorboard of the driver’s side of the car. The officers then stopped respondent and subjected him to a patdown search, which revealed no weapons. One of the officers shined his flashlight into the car, saw something protruding from under the armrest on the front seat, and upon lifting the armrest saw an open pouch that contained what appeared to be marihuana. Respondent was then arrested for possession of marihuana. A further search of the car’s interior revealed no more contraband, but the officers decided to impound the vehicle and more marihuana was found in the trunk. The Michigan state trial court denied respondent’s motion to suppress the marihuana taken from both the car’s interior and its trunk, and he was convicted of possession of marihuana. The Michigan Court of Appeals affirmed, holding that the search of the passenger compartment was valid as a protective search under Terry v. Ohio, 392 U.S. 1 , and that the search of the trunk was valid as an inventory search under South Dakota v. Opperman, 428 U.S. 364 . However, the Michigan Supreme Court reversed, holding that Terry did not justify the passenger compartment search, and that the marihuana found in the trunk was the “fruit” of the illegal search of the car’s interior.

Held:

1. This Court does not lack jurisdiction to decide the case on the asserted ground that the decision below rests on an adequate and independent state ground. Because of respect for the independence of state courts and the need to avoid rendering advisory opinions, this Court, in determining whether state court references to state law constitute adequate and independent state grounds, will no longer look beyond the opinion under review, or require state courts to reconsider cases to clarify the grounds of their decisions. Accordingly, when a state court decision fairly appears to rest primarily on federal law, or to be interwoven with federal law, and when the adequacy and independence of any possible state law ground is not clear from the face of the opinion, this Court will accept as the most reasonable explanation that the state court decided the case the way it did because it believed that federal law required it to do so. If the state court decision indicates clearly and expressly that it is alternatively based on bona fide separate, adequate, and independent state grounds, this Court will not undertake to review the decision. In this case, apart from two citations to the State Constitution, the court below relied exclusively on its understanding of Terry and other federal cases. Even if it is accepted that the Michigan Constitution has been interpreted to provide independent protection for certain rights also secured under the Fourth Amendment, it fairly appears that the Michigan Supreme Court rested its decision primarily on federal law. Pp. 1037-1044.


2. The protective search of the passenger compartment of respondent’s car was reasonable under the principles articulated in Terry and other decisions of this Court. Although Terry involved the stop and subsequent patdown search for weapons of a person suspected of criminal activity, it did not restrict the preventive search to the person of the detained suspect. Protection of police and others can justify protective searches when police have a reasonable belief that the suspect poses a danger. Roadside encounters between police and suspects are especially hazardous, and danger may arise from the possible presence of weapons in the area surrounding a suspect. Thus, the search of the passenger compartment of an automobile, limited to those areas in which a weapon may be placed or hidden, is permissible if the police officer possesses a reasonable belief based on specific and articulable facts which, taken together with the rational inferences from those facts, reasonably warrant the officer to believe that the suspect is dangerous and the suspect may gain immediate control of weapons. If, while conducting a legitimate Terry search of an automobile’s interior, the officer discovers contraband other than weapons, he cannot be required to ignore the contraband, and the Fourth Amendment does not require its suppression in such circumstances. The circumstances of this case justified the officers in their reasonable belief that respondent posed a danger if he were permitted to reenter his vehicle. Nor did they act unreasonably in taking preventive measures to ensure that there were no other weapons within respondent’s immediate grasp before permitting him to reenter his automobile. The fact that respondent was under the officers’ control during the investigative stop does not render unreasonable their belief that he could injure them. Pp. 1045-1052.


3. Because the Michigan Supreme Court suppressed the marihuana taken from the trunk as a fruit of what it erroneously held was an illegal search of the car’s interior, the case is remanded to enable it to determine whether the trunk search was permissible under Opperman, supra, or other decisions of this Court. P. 1053.


413 Mich. 461, 320 N. W. 2d 866, reversed and remanded.

O’CONNOR, J., delivered the opinion of the Court, in which BURGER, C. J., and WHITE, POWELL, and REHNQUIST, JJ., joined, and in Parts I, III, IV, and V of which BLACKMUN, J., joined. BLACKMUN, J., filed an opinion concurring in part and concurring in the judgment, post, p. 1054. BRENNAN, J., filed a dissenting opinion, in which MARSHALL, J., joined, post, p. 1054. STEVENS, J., filed a dissenting opinion, post, p. 1065.

Louis J. Caruso, Solicitor General of Michigan, argued the cause for petitioner. With him on the brief were Frank J. Kelley, Attorney General, and Leonard J. Malinowski, Assistant Attorney General.

David A. Strauss argued the cause for the United States as amicus curiae urging reversal. With him on the brief were Solicitor General Lee, Assistant Attorney General Jensen, and Deputy Solicitor General Frey.

James H. Geary argued the cause for respondent. With him on the brief was Joseph J. Jerkins.

David Crump, Wayne W. Schmidt, and James P. Manak filed a brief for the Gulf & Great Plains Legal Foundation of America et al. as amici curiae urging reversal.

JUSTICE O’CONNOR delivered the opinion of the Court.

In Terry v. Ohio, 392 U.S. 1 (1968), we upheld the validity of a protective search for weapons in the absence of probable cause to arrest because it is unreasonable to deny a police officer the right “to neutralize the threat of physical harm,” id., at 24, when he possesses an articulate suspicion that an individual is armed and dangerous. We did not, however, expressly address whether such a protective search for weapons could extend to an area beyond the person in the absence of probable cause to arrest. In the present case, respondent David Long was convicted for possession of marihuana found by police in the passenger compartment and trunk of the automobile that he was driving. The police searched the passenger compartment because they had reason to believe that the vehicle contained weapons potentially dangerous to the officers. We hold that the protective search of the passenger compartment was reasonable under the principles articulated in Terry and other decisions of this Court. We also examine Long’s argument that the decision below rests upon an adequate and independent state ground, and we decide in favor of our jurisdiction.

I
Deputies Howell and Lewis were on patrol in a rural area one evening when, shortly after midnight, they observed a car traveling erratically and at excessive speed. The officers observed the car turning down a side road, where it swerved off into a shallow ditch. The officers stopped to investigate. Long, the only occupant of the automobile, met the deputies at the rear of the car, which was protruding from the ditch onto the road. The door on the driver’s side of the vehicle was left open.

Deputy Howell requested Long to produce his operator’s license, but he did not respond. After the request was repeated, Long produced his license. Long again failed to respond when Howell requested him to produce the vehicle registration. After another repeated request, Long, who Howell thought “appeared to be under the influence of something,” 413 Mich. 461, 469, 320 N. W. 2d 866, 868 (1982), turned from the officers and began walking toward the open door of the vehicle. The officers followed Long and both observed a large hunting knife on the floorboard of the driver’s side of the car. The officers then stopped Long’s progress and subjected him to a Terry protective patdown, which revealed no weapons.

Long and Deputy Lewis then stood by the rear of the vehicle while Deputy Howell shined his flashlight into the interior of the vehicle, but did not actually enter it. The purpose of Howell’s action was “to search for other weapons.” 413 Mich., at 469, 320 N. W. 2d, at 868. The officer noticed that something was protruding from under the armrest on the front seat. He knelt in the vehicle and lifted the armrest. He saw an open pouch on the front seat, and upon flashing his light on the pouch, determined that it contained what appeared to be marihuana. After Deputy Howell showed the pouch and its contents to Deputy Lewis, Long was arrested for possession of marihuana. A further search of the interior of the vehicle, including the glovebox, revealed neither more contraband nor the vehicle registration. The officers decided to impound the vehicle. Deputy Howell opened the trunk, which did not have a lock, and discovered inside it approximately 75 pounds of marihuana.

The Barry County Circuit Court denied Long’s motion to suppress the marihuana taken from both the interior of the car and its trunk. He was subsequently convicted of possession of marihuana. The Michigan Court of Appeals affirmed Long’s conviction, holding that the search of the passenger compartment was valid as a protective search under Terry, supra, and that the search of the trunk was valid as an inventory search under South Dakota v. Opperman, 428 U.S. 364 (1976). See 94 Mich. App. 338, 288 N. W. 2d 629 (1979). The Michigan Supreme Court reversed. The court held that “the sole justification of the Terry search, protection of the police officers and others nearby, cannot justify the search in this case.” 413 Mich., at 472, 320 N. W. 2d, at 869. The marihuana found in Long’s trunk was considered by the court below to be the “fruit” of the illegal search of the interior, and was also suppressed.

We granted certiorari in this case to consider the important question of the authority of a police officer to protect himself by conducting a Terry-type search of the passenger compartment of a motor vehicle during the lawful investigatory stop of the occupant of the vehicle. 459 U.S. 904 (1982).

II
Before reaching the merits, we must consider Long’s argument that we are without jurisdiction to decide this case because the decision below rests on an adequate and independent state ground. The court below referred twice to the State Constitution in its opinion, but otherwise relied exclusively on federal law. Long argues that the Michigan courts have provided greater protection from searches and seizures under the State Constitution than is afforded under the Fourth Amendment, and the references to the State Constitution therefore establish an adequate and independent ground for the decision below.

It is, of course, “incumbent upon this Court . . . to ascertain for itself . . . whether the asserted non-federal ground independently and adequately supports the judgment.” Abie State Bank v. Bryan, 282 U.S. 765, 773(1931). Although we have announced a number of principles in order to help us determine whether various forms of references to state law constitute adequate and independent state grounds, we openly admit that we have thus far not developed a satisfying and consistent approach for resolving this vexing issue. In some instances, we have taken the strict view that if the ground of decision was at all unclear, we would dismiss the case. See, e. g., Lynch v. New York ex rel. Pierson, 293 U.S. 52 (1934). In other instances, we have vacated, see, e. g., Minnesota v. National Tea Co, 309 U.S. 551 (1940), or continued a case, see, e. g., Herb v. Pitcairn, 324 U.S. 117 (1945), in order to obtain clarification about the nature of a state court decision. See also California v. Krivda, 409 U.S. 33 (1972). In more recent cases, we have ourselves examined state law to determine whether state courts have used federal law to guide their application of state law or to provide the actual basis for the decision that was reached. See Texas v. Brown, 460 U.S. 730, 732 -733, n. 1 (1983) (plurality opinion). Cf. South Dakota v. Neville, 459 U.S. 553, 569 (1983) (STEVENS, J., dissenting). In Oregon v. Kennedy, 456 U.S. 667, 670 -671 (1982), we rejected an invitation to remand to the state court for clarification even when the decision rested in part on a case from the state court, because we determined that the state case itself rested upon federal grounds. We added that “[e]ven if the case admitted of more doubt as to whether federal and state grounds for decision were intermixed, the fact that the state court relied to the extent it did on federal grounds requires us to reach the merits.” Id., at 671.

This ad hoc method of dealing with cases that involve possible adequate and independent state grounds is antithetical to the doctrinal consistency that is required when sensitive issues of federal-state relations are involved. Moreover, none of the various methods of disposition that we have employed thus far recommends itself as the preferred method that we should apply to the exclusion of others, and we therefore determine that it is appropriate to reexamine our treatment of this jurisdictional issue in order to achieve the consistency that is necessary.

The process of examining state law is unsatisfactory because it requires us to interpret state laws with which we are generally unfamiliar, and which often, as in this case, have not been discussed at length by the parties. Vacation and continuance for clarification have also been unsatisfactory both because of the delay and decrease in efficiency of judicial administration, see Dixon v. Duffy, 344 U.S. 143 (1952), and, more important, because these methods of disposition place significant burdens on state courts to demonstrate the presence or absence of our jurisdiction. See Philadelphia Newspapers, Inc. v. Jerome, 434 U.S. 241, 244(1978) (REHNQUIST, J., dissenting); Department of Motor Vehicles v. Rios, 410 U.S. 425, 427 (1973) (Douglas, J., dissenting). Finally, outright dismissal of cases is clearly not a panacea because it cannot be doubted that there is an important need for uniformity in federal law, and that this need goes unsatisfied when we fail to review an opinion that rests primarily upon federal grounds and where the independence of an alleged state ground is not apparent from the four corners of the opinion. We have long recognized that dismissal is inappropriate “where there is strong indication . . . that the federal constitution as judicially construed controlled the decision below.” National Tea Co., supra, at 556.

Respect for the independence of state courts, as well as avoidance of rendering advisory opinions, have been the cornerstones of this Court’s refusal to decide cases where there is an adequate and independent state ground. It is precisely because of this respect for state courts, and this desire to avoid advisory opinions, that we do not wish to continue to decide issues of state law that go beyond the opinion that we review, or to require state courts to reconsider cases to clarify the grounds of their decisions. Accordingly, when, as in this case, a state court decision fairly appears to rest primarily on federal law, or to be interwoven with the federal law, and when the adequacy and independence of any possible state law ground is not clear from the face of the opinion, we will accept as the most reasonable explanation that the state court decided the case the way it did because it believed that federal law required it to do so. If a state court chooses merely to rely on federal precedents as it would on the precedents of all other jurisdictions, then it need only make clear by a plain statement in its judgment or opinion that the federal cases are being used only for the purpose of guidance, and do not themselves compel the result that the court has reached. In this way, both justice and judicial administration will be greatly improved. If the state court decision indicates clearly and expressly that it is alternatively based on bona fide separate, adequate, and independent grounds, we, of course, will not undertake to review the decision.

This approach obviates in most instances the need to examine state law in order to decide the nature of the state court decision, and will at the same time avoid the danger of our rendering advisory opinions. It also avoids the unsatisfactory and intrusive practice of requiring state courts to clarify their decisions to the satisfaction of this Court. We believe that such an approach will provide state judges with a clearer opportunity to develop state jurisprudence unimpeded by federal interference, and yet will preserve the integrity of federal law. “It is fundamental that state courts be left free and unfettered by us in interpreting their state constitutions. But it is equally important that ambiguous or obscure adjudications by state courts do not stand as barriers to a determination by this Court of the validity under the federal constitution of state action.” National Tea Co., supra, at 557.

The principle that we will not review judgments of state courts that rest on adequate and independent state grounds is based, in part, on “the limitations of our own jurisdiction.” Herb v. Pitcairn,324 U.S. 117, 125 (1945). The jurisdictional concern is that we not “render an advisory opinion, and if the same judgment would be rendered by the state court after we corrected its views of federal laws, our review could amount to nothing more than an advisory opinion.” Id., at 126. Our requirement of a “plain statement” that a decision rests upon adequate and independent state grounds does not in any way authorize the rendering of advisory opinions. Rather, in determining, as we must, whether we have jurisdiction to review a case that is alleged to rest on adequate and independent state grounds, see Abie State Bank v. Bryan, 282 U.S., at 773 , we merely assume that there are no such grounds when it is not clear from the opinion itself that the state court relied upon an adequate and independent state ground and when it fairly appears that the state court rested its decision primarily on federal law.

Our review of the decision below under this framework leaves us unconvinced that it rests upon an independent state ground. Apart from its two citations to the State Constitution, the court below relied exclusively on its understanding of Terry and other federal cases. Not a single state case was cited to support the state court’s holding that the search of the passenger compartment was unconstitutional. Indeed, the court declared that the search in this case was unconstitutional because “[t]he Court of Appeals erroneously applied the principles of Terry v. Ohio . . . to the search of the interior of the vehicle in this case.” 413 Mich., at 471, 320 N. W. 2d, at 869. The references to the State Constitution in no way indicate that the decision below rested on grounds in any way independent from the state court’s interpretation of federal law. Even if we accept that the Michigan Constitution has been interpreted to provide independent protection for certain rights also secured under the Fourth Amendment, it fairly appears in this case that the Michigan Supreme Court rested its decision primarily on federal law.

Rather than dismissing the case, or requiring that the state court reconsider its decision on our behalf solely because of a mere possibility that an adequate and independent ground supports the judgment, we find that we have jurisdiction in the absence of a plain statement that the decision below rested on an adequate and independent state ground. It appears to us that the state court “felt compelled by what it understood to be federal constitutional considerations to construe . . . its own law in the manner it did.” Zacchini v. Scripps-Howard Broadcasting Co., 433 U.S. 562, 568 (1977).

III
The court below held, and respondent Long contends, that Deputy Howell’s entry into the vehicle cannot be justified under the principles set forth in Terry because “Terry authorized only a limited pat-down search of a person suspected of criminal activity” rather than a search of an area. 413 Mich., at 472, 320 N. W. 2d, at 869 (footnote omitted). Brief for Respondent 10. Although Terry did involve the protective frisk of a person, we believe that the police action in this case is justified by the principles that we have already established in Terry and other cases.

In Terry, the Court examined the validity of a “stop and frisk” in the absence of probable cause and a warrant. The police officer in Terry detained several suspects to ascertain their identities after the officer had observed the suspects for a brief period of time and formed the conclusion that they were about to engage in criminal activity. Because the officer feared that the suspects were armed, he patted down the outside of the suspects’ clothing and discovered two revolvers.

Examining the reasonableness of the officer’s conduct in Terry, we held that there is “`no ready test for determining reasonableness other than by balancing the need to search [or seize] against the invasion which the search [or seizure] entails.’” 392 U.S., at 21 (quoting Camara v. Municipal Court, 387 U.S. 523, 536 -537 (1967). Although the conduct of the officer in Terry involved a “severe, though brief, intrusion upon cherished personal security,” 392 U.S., at 24 -25, we found that the conduct was reasonable when we weighed the interest of the individual against the legitimate interest in “crime prevention and detection,” id., at 22, and the “need for law enforcement officers to protect themselves and other prospective victims of violence in situations where they may lack probable cause for an arrest.” Id., at 24. When the officer has a reasonable belief “that the individual whose suspicious behavior he is investigating at close range is armed and presently dangerous to the officer or to others, it would appear to be clearly unreasonable to deny the officer the power to take necessary measures to determine whether the person is in fact carrying a weapon and to neutralize the threat of physical harm.” Ibid.

Although Terry itself involved the stop and subsequent patdown search of a person, we were careful to note that “[w]e need not develop at length in this case, however, the limitations which the Fourth Amendment places upon a protective search and seizure for weapons. These limitations will have to be developed in the concrete factual circumstances of individual cases.” Id., at 29. Contrary to Long’s view, Terry need not be read as restricting the preventative search to the person of the detained suspect.

In two cases in which we applied Terry to specific factual situations, we recognized that investigative detentions involving suspects in vehicles are especially fraught with danger to police officers. In Pennsylvania v. Mimms,434 U.S. 106 (1977), we held that police may order persons out of an automobile during a stop for a traffic violation, and may frisk those persons for weapons if there is a reasonable belief that they are armed and dangerous. Our decision rested in part on the “inordinate risk confronting an officer as he approaches a person seated in an automobile.” Id., at 110. In Adams v. Williams, 407 U.S. 143 (1972), we held that the police, acting on an informant’s tip, may reach into the passenger compartment of an automobile to remove a gun from a driver’s waistband even where the gun was not apparent to police from outside the car and the police knew of its existence only because of the tip. Again, our decision rested in part on our view of the danger presented to police officers in “traffic stop” and automobile situations.

Finally, we have also expressly recognized that suspects may injure police officers and others by virtue of their access to weapons, even though they may not themselves be armed. In the Term following Terry, we decided Chimel v. California, 395 U.S. 752 (1969), which involved the limitations imposed on police authority to conduct a search incident to a valid arrest. Relying explicitly on Terry, we held that when an arrest is made, it is reasonable for the arresting officer to search “the arrestee’s person and the area `within his immediate control’ – construing that phrase to mean the area from within which he might gain possession of a weapon or destructible evidence.” 395 U.S., at 763 . We reasoned that “[a] gun on a table or in a drawer in front of one who is arrested can be as dangerous to the arresting officer as one concealed in the clothing of the person arrested.” Ibid. In New York v. Belton, 453 U.S. 454 (1981), we determined that the lower courts “have found no workable definition of `the area within the immediate control of the arrestee’ when that area arguably includes the interior of an automobile and the arrestee is its recent occupant.” Id., at 460. In order to provide a “workable rule,” ibid., we held that “articles inside the relatively narrow compass of the passenger compartment of an automobile are in fact generally, even if not inevitably, within `the area into which an arrestee might reach in order to grab a weapon’ . . . .” Ibid. (quoting Chimel, supra, at 763). We also held that the police may examine the contents of any open or closed container found within the passenger compartment, “for if the passenger compartment is within the reach of the arrestee, so will containers in it be within his reach.” 453 U.S., at 460 (footnote omitted). See also Michigan v. Summers, 452 U.S. 692, 702 (1981).

Our past cases indicate then that protection of police and others can justify protective searches when police have a reasonable belief that the suspect poses a danger, that roadside encounters between police and suspects are especially hazardous, and that danger may arise from the possible presence of weapons in the area surrounding a suspect. These principles compel our conclusion that the search of the passenger compartment of an automobile, limited to those areas in which a weapon may be placed or hidden, is permissible if the police officer possesses a reasonable belief based on “specific and articulable facts which, taken together with the rational inferences from those facts, reasonably warrant” the officer in believing that the suspect is dangerous and the suspect may gain immediate control of weapons. See Terry, 392 U.S., at 21. “[T]he issue is whether a reasonably prudent man in the circumstances would be warranted in the belief that his safety or that of others was in danger.” Id., at 27. If a suspect is “dangerous,” he is no less dangerous simply because he is not arrested. If, while conducting a legitimate Terry search of the interior of the automobile, the officer should, as here, discover contraband other than weapons, he clearly cannot be required to ignore the contraband, and the Fourth Amendment does not require its suppression in such circumstances. Coolidge v. New Hampshire, 403 U.S. 443, 465 (1971); Michigan v. Tyler, 436 U.S. 499, 509 (1978); Texas v. Brown, 460 U.S., at 739 (plurality opinion by REHNQUIST, J.); id., at 746 (POWELL, J., concurring in judgment).

The circumstances of this case clearly justified Deputies Howell and Lewis in their reasonable belief that Long posed a danger if he were permitted to reenter his vehicle. The hour was late and the area rural. Long was driving his automobile at excessive speed, and his car swerved into a ditch. The officers had to repeat their questions to Long, who appeared to be “under the influence” of some intoxicant. Long was not frisked until the officers observed that there was a large knife in the interior of the car into which Long was about to reenter. The subsequent search of the car was restricted to those areas to which Long would generally have immediate control, and that could contain a weapon. The trial court determined that the leather pouch containing marihuana could have contained a weapon. App. 64a. It is clear that the intrusion was “strictly circumscribed by the exigencies which justifi[ed] its initiation.” Terry, supra, at 26.

In evaluating the validity of an officer’s investigative or protective conduct under Terry, the “[t]ouchstone of our analysis . . . is always `the reasonableness in all the circumstances of the particular governmental invasion of a citizen’s personal security.’” Pennsylvania v. Mimms, 434 U.S., at 108 -109 (quoting Terry, supra, at 19). In this case, the officers did not act unreasonably in taking preventive measures to ensure that there were no other weapons within Long’s immediate grasp before permitting him to reenter his automobile. Therefore, the balancing required by Terry clearly weighs in favor of allowing the police to conduct an area search of the passenger compartment to uncover weapons, as long as they possess an articulable and objectively reasonable belief that the suspect is potentially dangerous.

The Michigan Supreme Court appeared to believe that it was not reasonable for the officers to fear that Long could injure them, because he was effectively under their control during the investigative stop and could not get access to any weapons that might have been located in the automobile. See 413 Mich., at 472, 320 N. W. 2d, at 869. This reasoning is mistaken in several respects. During any investigative detention, the suspect is “in the control” of the officers in the sense that he “may be briefly detained against his will . . . .” Terry, supra, at 34 (WHITE, J., concurring). Just as a Terry suspect on the street may, despite being under the brief control of a police officer, reach into his clothing and retrieve a weapon, so might a Terry suspect in Long’s position break away from police control and retrieve a weapon from his automobile. See United States v. Rainone, 586 F.2d 1132, 1134 (CA7 1978), cert. denied, 440 U.S. 980 (1979). In addition, if the suspect is not placed under arrest, he will be permitted to reenter his automobile, and he will then have access to any weapons inside. United States v. Powless, 546 F.2d 792, 795-796 (CA8), cert. denied, 430 U.S. 910 (1977). Or, as here, the suspect may be permitted to reenter the vehicle before the Terry investigation is over, and again, may have access to weapons. In any event, we stress that a Terry investigation, such as the one that occurred here, involves a police investigation “at close range,” Terry, 392 U.S., at 24 , when the officer remains particularly vulnerable in part because a full custodial arrest has not been effected, and the officer must make a “quick decision as to how to protect himself and others from possible danger . . . .” Id., at 28. In such circumstances, we have not required that officers adopt alternative means to ensure their safety in order to avoid the intrusion involved in a Terry encounter.



IV
The trial court and the Court of Appeals upheld the search of the trunk as a valid inventory search under this Court’s decision in South Dakota v. Opperman, 428 U.S. 364 (1976). The Michigan Supreme Court did not address this holding, and instead suppressed the marihuana taken from the trunk as a fruit of the illegal search of the interior of the automobile. Our holding that the initial search was justified under Terry makes it necessary to determine whether the trunk search was permissible under the Fourth Amendment. However, we decline to address this question because it was not passed upon by the Michigan Supreme Court, whose decision we review in this case. See Cardinale v. Louisiana, 394 U.S. 437, 438 (1969). We remand this issue to the court below, to enable it to determine whether the trunk search was permissible under Opperman, supra, or other decisions of this Court. See, e. g., United States v. Ross, 456 U.S. 798 (1982).

V
The judgment of the Michigan Supreme Court is reversed, and the case is remanded for further proceedings not inconsistent with this opinion.

It is so ordered.
Footnotes
It is clear, and the respondent concedes, that if the officers had arrested Long for speeding or for driving while intoxicated, they could have searched the passenger compartment under New York v. Belton, 453 U.S. 454 (1981), and the trunk under United States v. Ross, 456 U.S. 798 (1982), if they had probable cause to believe that the trunk contained contraband. See Tr. of Oral Arg. 41. However, at oral argument, the State informed us that while Long could have been arrested for a speeding violation under Michigan law, he was not arrested because “[a]s a matter of practice,” police in Michigan do not arrest for speeding violations unless “more” is involved. See id., at 6. The officers did issue Long an appearance ticket. The petitioner also confirmed that the officers could have arrested Long for driving while intoxicated but they “would have to go through a process to make a determination as to whether the party is intoxicated and then go from that point.” Ibid.

The court below treated this case as involving a protective search, and not a search justified by probable cause to arrest for speeding, driving while intoxicated, or any other offense. Further, the petitioner does not argue that if probable cause to arrest exists, but the officers do not actually effect the arrest, the police may nevertheless conduct a search as broad as those authorized by Belton and Ross. Accordingly, we do not address that issue.

Chief Justice Coleman dissented, arguing that Terry v. Ohio, 392 U.S. 1 (1968), authorized the area search, and that the trunk search was a valid inventory search. See 413 Mich., at 473-480, 320 N. W. 2d, at 870-873. Justice Moody concurred in the result on the ground that the trunk search was improper. He agreed with Chief Justice Coleman that the interior search was proper under Terry. See 413 Mich., at 480-486, 320 N. W. 2d, at 873-875.

On the first occasion, the court merely cited in a footnote both the State and Federal Constitutions. See id., at 471, n. 4, 320 N. W. 2d, at 869, n. 4. On the second occasion, at the conclusion of the opinion, the court stated: “We hold, therefore, that the deputies’ search of the vehicle was proscribed by the Fourth Amendment to the United States Constitution and art. 1, 11 of the Michigan Constitution.” Id., at 472-473, 320 N. W. 2d, at 870.

For example, we have long recognized that “where the judgment of a state court rests upon two grounds, one of which is federal and the other non-federal in character, our jurisdiction fails if the non-federal ground is independent of the federal ground and adequate to support the judgment.” Fox Film Corp. v. Muller,296 U.S. 207, 210 (1935). We may review a state case decided on a federal ground even if it is clear that there was an available state ground for decision on which the state court could properly have relied. Beecher v. Alabama, 389 U.S. 35, 37 , n. 3 (1967). Also, if, in our view, the state court “`felt compelled by what it understood to be federal constitutional considerations to construe . . . its own law in the manner it did,’” then we will not treat a normally adequate state ground as independent, and there will be no question about our jurisdiction. Delaware v. Prouse, 440 U.S. 648, 653 (1979) (quoting Zacchini v. Scripps-Howard Broadcasting Co., 433 U.S. 562, 568 (1977). See also South Dakota v. Neville, 459 U.S. 553, 556 -557, n. 3 (1983). Finally, “where the non-federal ground is so interwoven with the [federal ground] as not to be an independent matter, or is not of sufficient breadth to sustain the judgment without any decision of the other, our jurisdiction is plain.” Enterprise Irrigation District v. Farmers Mutual Canal Co., 243 U.S. 157, 164 (1917).

Indeed, Dixon v. Duffy is also illustrative of another difficulty involved in our requiring state courts to reconsider their decisions for purposes of clarification. In Dixon, we continued the case on two occasions in order to obtain clarification, but none was forthcoming: “[T]he California court advised petitioner’s counsel informally that it doubted its jurisdiction to render such a determination.” 344 U.S., at 145 . We then vacated the judgment of the state court, and remanded.

There may be certain circumstances in which clarification is necessary or desirable, and we will not be foreclosed from taking the appropriate action.

In Herb v. Pitcairn, 324 U.S., at 128 , the Court also wrote that it was desirable that state courts “be asked rather than told what they have intended.” It is clear that we have already departed from that view in those cases in which we have examined state law to determine whether a particular result was guided or compelled by federal law. Our decision today departs further from Herb insofar as we disfavor further requests to state courts for clarification, and we require a clear and express statement that a decision rests on adequate and independent state grounds. However, the “plain statement” rule protects the integrity of state courts for the reasons discussed above. The preference for clarification expressed in Herb has failed to be a completely satisfactory means of protecting the state and federal interests that are involved.

It is not unusual for us to employ certain presumptions in deciding jurisdictional issues. For instance, although the petitioner bears the burden of establishing our jurisdiction, Durley v. Mayo, 351 U.S. 277, 285 (1956), we have held that the party who alleges that a controversy before us has become moot has the “heavy burden” of establishing that we lack jurisdiction. County of Los Angeles v. Davis, 440 U.S. 625, 631(1979). That is, we presume in those circumstances that we have jurisdiction until some party establishes that we do not for reasons of mootness.

We also note that the rule that we announce today was foreshadowed by our opinions in Delaware v. Prouse,440 U.S. 648 (1979), and Zacchini v. Scripps-Howard Broadcasting Co., 433 U.S. 562 (1977). In these cases, the state courts relied on both state and federal law. We determined that we had jurisdiction to decide the cases because our reading of the opinions led us to conclude that each court “felt compelled by what it understood to be federal constitutional considerations to construe and apply its own law in the manner it did.” Zacchini, supra, at 568; Delaware, supra, at 653. In Delaware, we referred to prior state decisions that confirmed our understanding of the opinion in that case, but our primary focus was on the face of the opinion. In Zacchini, we relied entirely on the syllabus and opinion of the state court.

In dissent, JUSTICE STEVENS proposes the novel view that this Court should never review a state court decision unless the Court wishes to vindicate a federal right that has been endangered. The rationale of the dissent is not restricted to cases where the decision is arguably supported by adequate and independent state grounds. Rather, JUSTICE STEVENS appears to believe that even if the decision below rests exclusively on federal grounds, this Court should not review the decision as long as there is no federal right that is endangered.

The state courts handle the vast bulk of all criminal litigation in this country. In 1982, more than 12 million criminal actions (excluding juvenile and traffic charges) were filed in the 50 state court systems and the District of Columbia. See 7 State Court Journal, No. 1, p. 18 (1983). By comparison, approximately 32,700 criminal suits were filed in federal courts during that same year. See Annual Report of the Director of the Administrative Office of the United States Courts 6 (1982). The state courts are required to apply federal constitutional standards, and they necessarily create a considerable body of “federal law” in the process. It is not surprising that this Court has become more interested in the application and development of federal law by state courts in the light of the recent significant expansion of federally created standards that we have imposed on the States.

At oral argument, Long argued that the state court relied on its decision in People v. Reed, 393 Mich. 342, 224 N. W. 2d 867, cert. denied, 422 U.S. 1044 (1975). See Tr. of Oral Arg. 29. However, the court cited that case only in the context of a statement that the State did not seek to justify the search in this case “by reference to other exceptions to the warrant requirement.” 413 Mich., at 472, 320 N. W. 2d, at 869-870 (footnote omitted). The court then noted that Reed held that “`[a] warrantless search and seizure is unreasonable per se and violates the Fourth Amendment of the United States Constitution and Art. 1, 11 of the state constitution unless shown to be within one of the exceptions to the rule.’” 413 Mich., at 472-473, n. 8, 320 N. W. 2d, at 870, n. 8.

There is nothing unfair about requiring a plain statement of an independent state ground in this case. Even if we were to rest our decision on an evaluation of the state law relevant to Long’s claim, as we have sometimes done in the past, our understanding of Michigan law would also result in our finding that we have jurisdiction to decide this case. Under state search-and-seizure law, a “higher standard” is imposed under Art. 1, 11, of the 1963 Michigan Constitution. See People v. Secrest, 413 Mich. 521, 525, 321 N. W. 2d 368, 369 (1982). If, however, the item seized is, inter alia, a “narcotic drug . . . seized by a peace officer outside the curtilage of any dwelling house in this state,” Art. 1, 11, of the 1963 Michigan Constitution, then the seizure is governed by a standard identical to that imposed by the Fourth Amendment. See People v. Moore, 391 Mich. 426, 435, 216 N. W. 2d 770, 775 (1974).

Long argues that under the current Michigan Comp. Laws 333.7107 (1979), the definition of a “narcotic” does not include marihuana. The difficulty with this argument is that Long fails to cite any authority for the proposition that the term “narcotic” as used in the Michigan Constitution is dependent on current statutory definitions of that term. Indeed, it appears that just the opposite is true. The Michigan Supreme Court has held that constitutional provisions are presumed “to be interpreted in accordance with existing laws and legal usages of the time” of the passage of the provision. Bacon v. Kent-Ottawa Authority, 354 Mich. 159, 169, 92 N. W. 2d 492, 497 (1958). If the state legislature were able to change the interpretation of a constitutional provision by statute, then the legislature would have “the power of outright repeal of a duly-voted constitutional provision.” Ibid. Applying these principles, the Michigan courts have held that a statute passed subsequent to the applicable state constitutional provision is not relevant for interpreting its Constitution, and that a definition in a legislative Act pertains only to that Act. Jones v. City of Ypsilanti, 26 Mich. App. 574, 182 N. W. 2d 795 (1970). See also Walber v. Piggins, 2 Mich. App. 145, 138 N. W. 2d 772 (1966), aff’d, 381 Mich. 138, 160 N. W. 2d 876 (1968). At the time that the 1963 Michigan Constitution was enacted, it is clear that marihuana was considered a narcotic drug. See 1961 Mich. Pub. Acts, No. 206, 1(f). Indeed, it appears that marihuana was considered a narcotic drug in Michigan until 1978, when it was removed from the narcotic classification. We would conclude that the seizure of marihuana in Michigan is not subject to analysis under any “higher standard” than may be imposed on the seizure of other items. In the light of our holding in Delaware v. Prouse,440 U.S. 648 (1979), that an interpretation of state law in our view compelled by federal constitutional considerations is not an independent state ground, we would have jurisdiction to decide the case.

Although we did not in any way weaken the warrant requirement, we acknowledged that the typical “stop and frisk” situation involves “an entire rubric of police conduct – necessarily swift action predicated upon the on-the-spot observations of the officer on the beat – which historically has not been, and as a practical matter could not be, subjected to the warrant procedure. Instead, the conduct in this case must be tested by the Fourth Amendment’s general proscription against unreasonable searches and seizures.” Terry, 392 U.S., at 20(footnote omitted). We have emphasized that the propriety of a Terry stop and frisk is to be judged according to whether the officer acted as a “reasonably prudent man” in deciding that the intrusion was justified. Id., at 27. “A brief stop of a suspicious individual, in order to determine his identity or to maintain the status quo momentarily while obtaining more information, may be most reasonable in light of the facts known to the officer at the time.” Adams v. Williams, 407 U.S. 143, 146 (1972).

As Chief Justice Coleman noted in her dissenting opinion in the present case:

“The opinion in Terry authorized the frisking of an overcoat worn by defendant because that was the issue presented by the facts. One could reasonably conclude that a different result would not have been constitutionally required if the overcoat had been carried, folded over the forearm, rather than worn. The constitutional principles stated in Terry would still control.” 413 Mich., at 475-476, 320 N. W. 2d, at 871 (footnote omitted).
According to one study, “approximately 30% of police shootings occurred when a police officer approached a suspect seated in an automobile. Bristow, Police Officer Shootings – A Tactical Evaluation, 54 J. Crim. L. C. & P. S. 93 (1963).” Adams v. Williams, supra, at 148, n. 3.
We stress that our decision does not mean that the police may conduct automobile searches whenever they conduct an investigative stop, although the “bright line” that we drew in Belton clearly authorizes such a search whenever officers effect a custodial arrest. An additional interest exists in the arrest context, i. e., preservation of evidence, and this justifies an “automatic” search. However, that additional interest does not exist in the Terry context. A Terry search, “unlike a search without a warrant incident to a lawful arrest, is not justified by any need to prevent the disappearance or destruction of evidence of crime. . . . The sole justification of the search . . . is the protection of the police officer and others nearby . . . .” 392 U.S., at 29 . What we borrow now from Chimel v. California, 395 U.S. 752 (1969), and Belton is merely the recognition that part of the reason to allow area searches incident to an arrest is that the arrestee, who may not himself be armed, may be able to gain access to weapons to injure officers or others nearby, or otherwise to hinder legitimate police activity. This recognition applies as well in the Terry context. However, because the interest in collecting and preserving evidence is not present in the Terry context, we require that officers who conduct area searches during investigative detentions must do so only when they have the level of suspicion identified in Terry.

Of course, our analysis would apply to justify the search of Long’s person that was conducted by the officers after the discovery of the knife.

Long makes a number of arguments concerning the invalidity of the search of the passenger compartment. The thrust of these argument is that Terry searches are limited in scope and that an area search is fundamentally inconsistent with this limited scope. We have recognized that Terry searches are limited insofar as they may not be conducted in the absence of an articulable suspicion that the intrusion is justified, see, e. g., Sibron v. New York, 392 U.S. 40, 65 (1968), and that they are protective in nature and limited to weapons, see Ybarra v. Illinois, 444 U.S. 85, 93 -94 (1979). However, neither of these concerns is violated by our decision. To engage in an area search, which is limited to seeking weapons, the officer must have an articulable suspicion that the suspect is potentially dangerous.

Long also argues that there cannot be a legitimate Terry search based on the discovery of the hunting knife because Long possessed that weapon legally. See Brief for Respondent 17. Assuming, arguendo, that Long possessed the knife lawfully, we have expressly rejected the view that the validity of a Terry search depends on whether the weapon is possessed in accordance with state law. See Adams v. Williams, 407 U.S., at 146 .

Contrary to JUSTICE BRENNAN’s suggestion in dissent, the reasoning of Terry, Chimel, and Belton points clearly to the direction that we have taken today. Although Chimel involved a full custodial arrest, the rationale for Chimel rested on the recognition in Terry that it is unreasonable to prevent the police from taking reasonable steps to protect their safety.

JUSTICE BRENNAN suggests that we are expanding the scope of a Terry-type search to include a search incident to a valid arrest. However, our opinion clearly indicates that the area search that we approve is limited to a search for weapons in circumstances where the officers have a reasonable belief that the suspect is potentially dangerous to them. JUSTICE BRENNAN quotes at length from Sibron, but fails to recognize that the search in that case was a search for narcotics, and not a search for weapons.

JUSTICE BRENNAN concedes that “police should not be exposed to unnecessary danger in the performance of their duties,” post, at 1064, but then would require that police officers, faced with having to make quick determinations about self-protection and the defense of innocent citizens in the area, must also decide instantaneously what “less intrusive” alternative exists to ensure that any threat presented by the suspect will be neutralized. Post, at 1065. For the practical reasons explained in Terry, 392 U.S., at 24 , 28, we have never required police to adopt alternative measures to avoid a legitimate Terry-type intrusion.

Long suggests that the trunk search is invalid under state law. See Tr. of Oral Arg. 41, 43-44. The Michigan Supreme Court is, of course, free to determine the validity of that search under state law.

JUSTICE BLACKMUN, concurring in part and concurring in the judgment.

I join Parts I, III, IV, and V of the Court’s opinion. While I am satisfied that the Court has jurisdiction in this particular case, I do not join the Court, in Part II of its opinion, in fashioning a new presumption of jurisdiction over cases coming here from state courts. Although I agree with the Court that uniformity in federal criminal law is desirable, I see little efficiency and an increased danger of advisory opinions in the Court’s new approach.

JUSTICE BRENNAN, with whom JUSTICE MARSHALL joins, dissenting.

The Court today holds that “the protective search of the passenger compartment” of the automobile involved in this case “was reasonable under the principles articulated in Terry and other decisions of this Court.” Ante, at 1035. I disagree. Terry v. Ohio, 392 U.S. 1 (1968), does not support the Court’s conclusion and the reliance on “other decisions” is patently misplaced. Plainly, the Court is simply continuing the process of distorting Terry beyond recognition and forcing it into service as an unlikely weapon against the Fourth Amendment’s fundamental requirement that searches and seizures be based on probable cause. See United States v. Place, 462 U.S. 696, 714 -717 (1983) (BRENNAN, J., concurring in result). I, therefore, dissent.

On three occasions this Term I have discussed the limited scope of the exception to the probable-cause requirement created by Terry and its progeny. See Florida v. Royer, 460 U.S. 491, 509 -511 (1983) (BRENNAN, J., concurring in result); Kolender v. Lawson, 461 U.S. 352, 364 -365 (1983) (BRENNAN, J., concurring); United States v. Place, supra, at 711-717 (BRENNAN, J., concurring in result). I will not repeat those discussions here and note only that “Terry, and the cases that followed it, permit only brief investigative stops and extremely limited searches based on reasonable suspicion.” 462 U.S., at 714 . However, the Court’s opinion compels a detailed review of Terry itself.

In Terry, the Court confronted the “quite narrow question” of “whether it is always unreasonable for a policeman to seize a person and subject him to a limited search for weapons unless there is probable cause for an arrest.” 392 U.S., at 15 (emphasis supplied). Because the Court was dealing “with an entire rubric of police conduct . . . which historically [had] not been, and as a practical matter could not be, subjected to the warrant procedure,” id., at 20, the Court tested the conduct at issue “by the Fourth Amendment’s general proscription against unreasonable searches and seizures.” Ibid. (footnote omitted). In considering the “reasonableness” of the conduct, the Court balanced “`the need to search [or seize] against the invasion which the search [or seizure] entails.’” Id., at 21, quoting Camara v. Municipal Court, 387 U.S. 523, 534 -535, 536-537 (1967). It deserves emphasis that in discussing the “invasion” at issue, the Court stated that “[e]ven a limited search of the outer clothing for weapons constitutes a severe, though brief, intrusion upon cherished personal security . . . .”392 U.S., at 24 -25 (emphasis supplied). Ultimately, the Court concluded that “there must be a narrowly drawn authority to permit a reasonable search for weapons for the protection of the police officer, where he has reason to believe that he is dealing with an armed and dangerous individual, regardless of whether he has probable cause to arrest the individual for a crime.” Id., at 27 (emphasis supplied). The Court expressed its holding as follows:

“We merely hold today that where a police officer observes unusual conduct which leads him reasonably to conclude in light of his experience that criminal activity may be afoot and that the persons with whom he is dealing may be armed and presently dangerous, where in the course of investigating this behavior he identifies himself as a policeman and makes reasonable inquiries, and where nothing in the initial stages of the encounter serves to dispel his reasonable fear for his own or others’ safety, he is entitled for the protection of himself and others in the area to conduct a carefully limited search of the outer clothing of such persons in an attempt to discover weapons which might be used to assault him.” Id., at 30 (emphasis supplied).
It is clear that Terry authorized only limited searches of the person for weapons. In light of what Terry said, relevant portions of which the Court neglects to quote, the Court’s suggestion that “Terry need not be read as restricting the preventive search to the person of the detained suspect,” ante, at 1047 (footnote omitted), can only be described as disingenuous. Nothing in Terry authorized police officers to search a suspect’s car based on reasonable suspicion. The Court confirmed this this very Term in United States v. Place, supra, where it described the search authorized by Terry as a “limited search for weapons, or `frisk’ . . . .” 462 U.S., at 702 . The search at issue in this case is a far cry from a “frisk” and certainly was not “limited.”

The Court’s reliance on Chimel v. California, 395 U.S. 752 (1969), and New York v. Belton, 453 U.S. 454 (1981), as support for its new “area search” rule within the context of a Terry stop is misplaced. In Chimel, the Court addressed the scope of a search incident to a lawful arrest, 395 U.S., at 753 , and held invalid the search at issue there because it “went far beyond the petitioner’s person and the area from within which he might have obtained either a weapon or something that could have been used as evidence against him.” Id., at 768. Chimel stressed the need to limit the scope of searches incident to arrest and overruled two prior decisions of this Court validating overly broad searches. Ibid.

In Belton, the Court considered the scope of a search incident to the lawful custodial arrest of an occupant of an automobile. 453 U.S., at 455 . In this “particular and problematic context,” id., at 460, n. 3, the Court held that “when a policeman has made a lawful custodial arrest of the occupant of an automobile, he may, as a contemporaneous incident of that arrest, search the passenger compartment of that automobile.” Id., at 460 (footnote omitted).

The critical distinction between this case and Terry on the one hand, and Chimel and Belton on the other, is that the latter two cases arose within the context of lawful custodial arrests supported by probable cause. The Court in Terry expressly recognized the difference between a search incident to arrest and the “limited search for weapons,” 392 U.S., at 25 , involved in that case. The Court stated:

“[A search incident to arrest], although justified in part by the acknowledged necessity to protect the arresting officer from assault with a concealed weapon, . . . is also justified on other grounds, . . . and can therefore involve a relatively extensive exploration of the person. A search for weapons in the absence of probable cause to arrest, however, must, like any other search, be strictly circumscribed by the exigencies which justify its initiation. . . . Thus it must be limited to that which is necessary for the discovery of weapons which might be used to harm the officer or others nearby, and may realistically be characterized as something less than a `full’ search, even though it remains a serious intrusion.
“. . . An arrest is a wholly different kind of intrusion upon individual freedom from a limited search for weapons, and the interests each is designed to serve are likewise quite different. An arrest is the initial stage of a criminal prosecution. It is intended to vindicate society’s interest in having its laws obeyed, and it is inevitably accompanied by future interference with the individual’s freedom of movement, whether or not trial or conviction ultimately follows. The protective search for weapons, on the other hand, constitutes a brief, though far from inconsiderable, intrusion upon the sanctity of the person.” Id., at 25-26 (footnote omitted).
In United States v. Robinson, 414 U.S. 218 (1973), the Court relied on the differences between searches incident to lawful custodial arrests and Terry “stop-and-frisk” searches to reject an argument that the limitations established in Terry should be applied to a search incident to arrest. 414 U.S., at 228 . The Court noted that “Terry clearly recognized the distinction between the two types of searches, and that a different rule governed one than governed the other,” id., at 233, and described Terry as involving “stricter . . . standards,” 414 U.S., at 234 , than those governing searches incident to arrest. The Court went on to state:

“A custodial arrest of a suspect based on probable cause is a reasonable intrusion under the Fourth Amendment; that intrusion being lawful, a search incident to the arrest requires no additional justification. It is the fact of the lawful arrest which establishes the authority to search, and we hold that in the case of a lawful custodial arrest a full search of the person is not only an exception to the warrant requirement of the Fourth Amendment, but is also a `reasonable’ search under that Amendment.” Id., at 235.
See also id., at 237-238 (POWELL, J., concurring) (“The search incident to arrest is reasonable under the Fourth Amendment because the privacy interest protected by that constitutional guarantee is legitimately abated by the fact of arrest” (footnote omitted)); Gustafson v. Florida, 414 U.S. 260, 264 (1973).

As these cases recognize, there is a vital difference between searches incident to lawful custodial arrests and Terry protective searches. The Court deliberately ignores that difference in relying on principles developed within the context of intrusions supported by probable cause to arrest to construct an “area search” rule within the context of a Terry stop.

The Court denies that an “area search” is fundamentally inconsistent with Terry, see ante, at 1052, n. 16, stating:

“We have recognized that Terry searches are limited insofar as they may not be conducted in the absence of an articulable suspicion that the intrusion is justified, see e. g., Sibron v. New York, 392 U.S. 40, 65 (1968), and that they are protective in nature and limited to weapons, see Ybarra v. Illinois, 444 U.S. 85, 93 -94 (1979). However, neither of these concerns is violated by our decision. To engage in an area search, which is limited to seeking weapons, the officer must have an articulable suspicion that the suspect is potentially dangerous.” Ibid.
This patently is no answer: respondent’s argument relates to the scope of the search, not to the standard that justifies it. The Court flouts Terry’s holding that Terry searches must be carefully limited in scope. See supra, at 1056. Indeed, the page in Sibron v. New York, 392 U.S. 40 (1968), cited by the Court states:

“Even assuming arguendo that there were adequate grounds to search Sibron for weapons, the nature and scope of the search conducted by Patrolman Martin were so clearly unrelated to that justification as to render the heroin inadmissible. The search for weapons approved in Terry consisted solely of a limited patting of the outer clothing of the suspect for concealed objects which might be used as instruments of assault. Only when he discovered such objects did the officer in Terry place his hands in the pockets of the men he searched. In this case, with no attempt at an initial limited exploration for arms, Patrolman Martin thrust his hand into Sibron’s pocket and took from him envelopes of heroin. His testimony shows that he was looking for narcotics, and he found them. The search was not reasonably limited in scope to the accomplishment of the only goal which might conceivably have justified its inception – the protection of the officer by disarming a potentially dangerous man.” Id., at 65 (emphasis supplied).
As this passage makes clear, the scope of a search is determined not only by reference to its purpose, but also by reference to its intrusiveness. Yet the Court today holds that a search of a car (and the containers within it) that is not even occupied by the suspect is only as intrusive as, or perhaps less intrusive than, thrusting a hand into a pocket after an initial patdown has suggested the presence of concealed objects that might be used as weapons.

The Court suggests no limit on the “area search” it now authorizes. The Court states that a “search of the passenger compartment of an automobile, limited to those areas in which a weapon may be placed or hidden, is permissible if the police officer possesses a reasonable belief based on `specific and articulable facts which, taken together with the rational inferences from those facts, reasonably warrant’ the officers in believing that the suspect is dangerous and the suspect may gain immediate control of weapons.” Ante, at 1049 (footnote omitted). Presumably a weapon “may be placed or hidden” anywhere in a car. A weapon also might be hidden in a container in the car. In this case, the Court upholds the officer’s search of a leather pouch because it “could have contained a weapon.” Ante, at 1050-1051 (footnote omitted). In addition, the Court’s requirement that an officer have a reasonable suspicion that a suspect is armed and dangerous does little to check the initiation of an area search. In this case, the officers saw a hunting knife in the car, see ante, at 1036, 1050, but the Court does not base its holding that the subsequent search was permissible on the ground that possession of the knife may have been illegal under state law. See ante, at 1052-1053, n. 16. An individual can lawfully possess many things that can be used as weapons. A hammer, or a baseball bat, can be used as a very effective weapon. Finally, the Court relies on the following facts to conclude that the officers had a reasonable suspicion that respondent was presently dangerous: the hour was late; the area was rural; respondent had been driving at an excessive speed; he had been involved in an accident; he was not immediately responsive to the officers’ questions; and he appeared to be under the influence of some intoxicant. Ante, at 1050. Based on these facts, one might reasonably conclude that respondent was drunk. A drunken driver is indeed dangerous while driving, but not while stopped on the roadside by the police. Even when an intoxicated person lawfully has in his car an object that could be used as a weapon, it requires imagination to conclude that he is presently dangerous. Even assuming that the facts in this case justified the officers’ initial “frisk” of respondent, see ante, at 1035-1036, 1050-1051, and n. 15, they hardly provide adequate justification for a search of a suspect’s car and the containers within it. This represents an intrusion not just different in degree, but in kind, from the intrusion sanctioned by Terry. In short, the implications of the Court’s decision are frightening.

The Court also rejects the Michigan Supreme Court’s view that it “was not reasonable for the officers to fear that [respondent] could injure them, because he was effectively under their control during the investigative stop and could not get access to any weapons that might have been located in the automobile.” Ante, at 1051. In this regard, the Court states:

“[W]e stress that a Terry investigation, such as the one that occurred here, involves a police investigation `at close range,’. . . when the officer remains particularly vulnerable in part because a full custodial arrest has not been effected, and the officer must make a `quick decision as to how to protect himself and others from possible danger.’ . . . In such circumstances, we have not required that officers adopt alternative means to ensure their safety in order to avoid the intrusion involved in a Terry encounter.” Ante, at 1052 (footnote omitted; emphasis in original).
Putting aside the fact that the search at issue here involved a far more serious intrusion than that “involved in a Terry encounter,” see ibid., and as such might suggest the need for resort to “alternative means,” the Court’s reasoning is perverse. The Court’s argument in essence is that the absence of probable cause to arrest compels the conclusion that a broad search, traditionally associated in scope with a search incident to arrest, must be permitted based on reasonable suspicion. But United States v. Robinson, stated: “It is scarcely open to doubt that the danger to an officer is far greater in the case of the extended exposure which follows the taking of a suspect into custody and transporting him to the police station than in the case of the relatively fleeting contact resulting from the typical Terry-type stop.” 414 U.S., at 234 -235. In light of Robinson’s observation, today’s holding leaves in grave doubt the question of whether the Court’s assessment of the relative dangers posed by given confrontations is based on any principled standard.

Moreover, the Court’s reliance on a “balancing” of the relevant interests to justify its decision, see ante, at 1051, is certainly inappropriate. In Dunaway v. New York, 442 U.S. 200 (1979), the Court stated that “[t]he narrow intrusions involved in [Terry and its progeny] were judged by a balancing test rather than by the general principle that Fourth Amendment seizures must be supported by the `long-prevailing standards’ of probable cause, . . . only because these intrusions fell far short of the kind of intrusion associated with an arrest.” Id., at 212. The intrusion involved in this case is precisely “the kind of intrusion associated with an arrest.” There is no justification, therefore, for “balancing” the relevant interests.

In sum, today’s decision reflects once again the threat to Fourth Amendment values posed by “balancing.” See United States v. Place, 462 U.S., at 717 -719 (BRENNAN, J., concurring in result). As Justice Frankfurter stated in United States v. Rabinowitz, 339 U.S. 56 (1950):

“To say that the search must be reasonable is to require some criterion of reason. It is no guide at all either for a jury or for district judges or the police to say that an `unreasonable search’ is forbidden – that the search must be reasonable. What is the test of reason which makes a search reasonable? The test is the reason underlying and expressed by the Fourth Amendment: the history and the experience which it embodies and the safeguards afforded by it against the evils to which it was a response.” Id., at 83 (dissenting opinion).
Hornbook law has been that “the police may not conduct a search unless they first convince a neutral magistrate that there is probable cause to do so.” New York v. Belton, 453 U.S., at 457 . While under some circumstances the police may search a car without a warrant, see, e. g., Carroll v. United States, 267 U.S. 132(1925), “the exception to the warrant requirement established in Carroll . . . applies only to searches of vehicles that are supported by probable cause.” United States v. Ross, 456 U.S. 798, 809 (1982) (footnote omitted). “[T]he Court in Carroll emphasized the importance of the requirement that officers have probable cause to believe that the vehicle contains contraband.” Id., at 807-808. See also Almeida-Sanchez v. United States, 413 U.S. 266, 269 (1973) (“Automobile or no automobile, there must be probable cause for the search” (footnote omitted)). Today the Court discards these basic principles and employs the very narrow exception established by Terry “to swallow the general rule that Fourth Amendment [searches of cars] are `reasonable’ only if based on probable cause.” Dunaway v. New York, supra, at 213. See also United States v. Place, supra, at 718-719 (BRENNAN, J., concurring in result).

Today’s decision disregards the Court’s warning in Almeida-Sanchez: “The needs of law enforcement stand in constant tension with the Constitution’s protections of the individual against certain exercises of official power. It is precisely the predictability of these pressures that counsels a resolute loyalty to constitutional safeguards.”413 U.S., at 273 . Of course, police should not be exposed to unnecessary danger in the performance of their duties. But a search of a car and the containers within it based on nothing more than reasonable suspicion, even under the circumstances present here, cannot be sustained without doing violence to the requirements of the Fourth Amendment. There is no reason in this case why the officers could not have pursued less intrusive, but equally effective, means of insuring their safety. Cf. United States v. Place, supra, at 715-716; Florida v. Royer, 460 U.S., at 511 , n. (BRENNAN, J., concurring in result). The Court takes a long step today toward “balancing” into oblivion the protections the Fourth Amendment affords. I dissent, for as Justice Jackson said in Brinegar v. United States, 338 U.S. 160 (1949):

“[Fourth Amendment rights] are not mere second-class rights but belong in the catalog of indispensable freedoms. Among deprivations of rights, none is so effective in cowing a population, crushing the spirit of the individual and putting terror in every heart. Uncontrolled search and seizure is one of the first and most effective weapons in the arsenal of every arbitrary government.” Id., at 180 (dissenting opinion).
JUSTICE STEVENS, dissenting.

The jurisprudential questions presented in this case are far more important than the question whether the Michigan police officer’s search of respondent’s car violated the Fourth Amendment. The case raises profoundly significant questions concerning the relationship between two sovereigns – the State of Michigan and the United States of America.

The Supreme Court of the State of Michigan expressly held “that the deputies’ search of the vehicle was proscribed by the Fourth Amendment to the United States Constitution and art 1, 11 of the Michigan Constitution.” 413 Mich. 461, 472-473, 320 N. W. 2d 866, 870 (1982) (emphasis added). The state law ground is clearly adequate to support the judgment, but the question whether it is independent of the Michigan Supreme Court’s understanding of federal law is more difficult. Four possible ways of resolving that question present themselves: (1) asking the Michigan Supreme Court directly, (2) attempting to infer from all possible sources of state law what the Michigan Supreme Court meant, (3) presuming that adequate state grounds are independent unless it clearly appears otherwise, or (4) presuming that adequate state grounds are not independent unless it clearly appears otherwise. This Court has, on different occasions, employed each of the first three approaches; never until today has it even hinted at the fourth. In order to “achieve the consistency that is necessary,” the Court today undertakes a reexamination of all the possibilities. Ante, at 1039. It rejects the first approach as inefficient and unduly burdensome for state courts, and rejects the second approach as an inappropriate expenditure of our resources. Ante, at 1039-1040. Although I find both of those decisions defensible in themselves, I cannot accept the Court’s decision to choose the fourth approach over the third – to presume that adequate state grounds are intended to be dependent on federal law unless the record plainly shows otherwise. I must therefore dissent.

If we reject the intermediate approaches, we are left with a choice between two presumptions: one in favor of our taking jurisdiction, and one against it. Historically, the latter presumption has always prevailed. See, e. g., Durley v. Mayo, 351 U.S. 277, 285 (1956); Stembridge v. Georgia, 343 U.S. 541, 547 (1952); Lynch v. New York ex rel. Pierson, 293 U.S. 52 (1934). The rule, as succinctly stated in Lynch, was as follows:

“Where the judgment of the state court rests on two grounds, one involving a federal question and the other not, or if it does not appear upon which of two grounds the judgment was based, and the ground independent of a federal question is sufficient in itself to sustain it, this Court will not take jurisdiction. Allen v. Arguimbau, 198 U.S. 149, 154 , 155; Johnson v. Risk, [137 U.S. 300, 306, 307]; Wood Mowing & Reaping Machine Co. v. Skinner, [139 U.S. 293, 295, 297]; Consolidated Turnpike Co. v. Norfolk & Ocean View Ry. Co., 228 U.S. 596, 599 ; Cuyahoga River Power Co. v. Northern Realty Co., 244 U.S. 300, 302 , 304.” Id., at 54-55.
The Court today points out that in several cases we have weakened the traditional presumption by using the other two intermediate approaches identified above. Since those two approaches are now to be rejected, however, I would think that stare decisis would call for a return to historical principle. Instead, the Court seems to conclude that because some precedents are to be rejected, we must overrule them all.

Even if I agreed with the Court that we are free to consider as a fresh proposition whether we may take presumptive jurisdiction over the decisions of sovereign States, I could not agree that an expansive attitude makes good sense. It appears to be common ground that any rule we adopt should show “respect for state courts, and [a] desire to avoid advisory opinions.” Ante, at 1040. And I am confident that all Members of this Court agree that there is a vital interest in the sound management of scarce federal judicial resources. All of those policies counsel against the exercise of federal jurisdiction. They are fortified by my belief that a policy of judicial restraint – one that allows other decisional bodies to have the last word in legal interpretation until it is truly necessary for this Court to intervene – enables this Court to make its most effective contribution to our federal system of government.

The nature of the case before us hardly compels a departure from tradition. These are not cases in which an American citizen has been deprived of a right secured by the United States Constitution or a federal statute. Rather, they are cases in which a state court has upheld a citizen’s assertion of a right, finding the citizen to be protected under both federal and state law. The attorney for the complaining party is an officer of the State itself, who asks us to rule that the state court interpreted federal rights too broadly and “overprotected” the citizen.

Such cases should not be of inherent concern to this Court. The reason may be illuminated by assuming that the events underlying this case had arisen in another country, perhaps the Republic of Finland. If the Finnish police had arrested a Finnish citizen for possession of marihuana, and the Finnish courts had turned him loose, no American would have standing to object. If instead they had arrested an American citizen and acquitted him, we might have been concerned about the arrest but we surely could not have complained about the acquittal, even if the Finnish court had based its decision on its understanding of the United States Constitution. That would be true even if we had a treaty with Finland requiring it to respect the rights of American citizens under the United States Constitution. We would only be motivated to intervene if an American citizen were unfairly arrested, tried, and convicted by the foreign tribunal.

In this case the State of Michigan has arrested one of its citizens and the Michigan Supreme Court has decided to turn him loose. The respondent is a United States citizen as well as a Michigan citizen, but since there is no claim that he has been mistreated by the State of Michigan, the final outcome of the state processes offended no federal interest whatever. Michigan simply provided greater protection to one of its citizens than some other State might provide or, indeed, than this Court might require throughout the country.

I believe that in reviewing the decisions of state courts, the primary role of this Court is to make sure that persons who seek to vindicate federal rights have been fairly heard. That belief resonates with statements in many of our prior cases. In Abie State Bank v. Bryan, 282 U.S. 765 (1931), the Supreme Court of Nebraska had rejected a federal constitutional claim, relying in part on the state law doctrine of laches. Writing for the Court in response to the Nebraska Governor’s argument that the Court should not accept jurisdiction because laches provided an independent ground for decision, Chief Justice Hughes concluded that this Court must ascertain for itself whether the asserted nonfederal ground independently and adequately supported the judgment “in order that constitutional guaranties may appropriately be enforced.” Id., at 773. He relied on our earlier opinion in Union Pacific R. Co. v. Public Service Comm’n of Missouri, 248 U.S. 67 (1918), in which Justice Holmes had made it clear that the Court engaged in such an inquiry so that it would not “be possible for a State to impose an unconstitutional burden” on a private party. Id., at 70. And both Abie and Union Pacific rely on Creswill v. Knights of Pythias, 225 U.S. 246, 261 (1912), in which the Court explained its duty to review the findings of fact of a state court “where a Federal right has been denied.”

Until recently we had virtually no interest in cases of this type. Thirty years ago, this Court reviewed only one. Nevada v. Stacher, 346 U.S. 906 (1953). Indeed, that appears to have been the only case during the entire 1953 Term in which a State even sought review of a decision by its own judiciary. Fifteen years ago, we did not review any such cases, although the total number of requests had mounted to three. Some time during the past decade, perhaps about the time of the 5-to-4 decision in Zacchini v. Scripps-Howard Broadcasting Co., 433 U.S. 562 (1977), our priorities shifted. The result is a docket swollen with requests by States to reverse judgments that their courts have rendered in favor of their citizens. I am confident that a future Court will recognize the error of this allocation of resources. When that day comes, I think it likely that the Court will also reconsider the propriety of today’s expansion of our jurisdiction.

The Court offers only one reason for asserting authority over cases such as the one presented today: “an important need for uniformity in federal law [that] goes unsatisfied when we fail to review an opinion that rests primarily upon federal grounds and where the independence of an alleged state ground is not apparent from the four corners of the opinion.” Ante, at 1040 (emphasis omitted). Of course, the supposed need to “review an opinion” clashes directly with our oft-repeated reminder that “our power is to correct wrong judgments, not to revise opinions.” Herb v. Pitcairn, 324 U.S. 117, 126 (1945). The clash is not merely one of form: the “need for uniformity in federal law” is truly an ungovernable engine. That same need is no less present when it is perfectly clear that a state ground is both independent and adequate. In fact, it is equally present if a state prosecutor announces that he believes a certain policy of nonenforcement is commanded by federal law. Yet we have never claimed jurisdiction to correct such errors, no matter how egregious they may be, and no matter how much they may thwart the desires of the state electorate. We do not sit to expound our understanding of the Constitution to interested listeners in the legal community; we sit to resolve disputes. If it is not apparent that our views would affect the outcome of a particular case, we cannot presume to interfere.

Finally, I am thoroughly baffled by the Court’s suggestion that it must stretch its jurisdiction and reverse the judgment of the Michigan Supreme Court in order to show “[r]espect for the independence of state courts.” Ante, at 1040. Would we show respect for the Republic of Finland by convening a special sitting for the sole purpose of declaring that its decision to release an American citizen was based upon a misunderstanding of American law?

I respectfully dissent.