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Opinion:
ILLINOIS v. WARDLOW
No. 98-1036.
Argued November 2, 1999
Decided January 12, 2000
Rehnquist, C. J., delivered the opinion of the Court, in which O’Con-nor, ScALtA, Kennedy, and Thomas, JJ., joined. Stevens, J., filed an opinion concurring in part and dissenting in part, in which Soxjter, Ginsburg, and Breyer, JJ., joined, post, p. 126.
Richard A. Devine argued the cause for petitioner. With him on the briefs were James E. Ryan, Attorney General of Illinois, Joel D. Bertocchi, Solicitor General, Renee G. Goldfarb, Theodore Fotios Burtzos, and Veronica Ximena Calderon.
Malcolm L. Stewart argued the cause for the United States as amicus curiae urging reversal. With him on the brief were Solicitor General Waxman, Assistant Attorney General Robinson, Deputy Solicitor General Dreeben, and Deborah Watson.
James B. Koch argued the cause for respondent. With him on the brief were Lynn N. Weisberg and Thomas G. Gardiner
Briefs of amici curiae urging reversal were filed for the State of Ohio et al. by Betty D. Montgomery, Attorney General of Ohio, Edward B. Foley, State Solicitor, Robert C. Maier and Alejandro Almaguer, Assistant Solicitors, and Thomas R. Keller, Acting Attorney General of Hawaii, and by the Attorneys General for their respective States as follows: Bill Pryor of Alabama, Ken Salazar of Colorado, M. Jane Brady of Delaware, Alan G. Lance of Idaho, Carla J Stovall of Kansas, Richard P. Ieyoub of Louisiana, Mike Hatch of Minnesota, Michael C. Moore of Mississippi, Don Stenberg of Nebraska, Frankie Sue Del Papa of Nevada, Michael P. Easley of North Carolina, W. A Drew Edmondson of Oklahoma, Charles M. Condon of South Carolina, Mark L. Barnett of South Dakota, and Mark L. Earley of Virginia; for the Wayne County Prosecuting Attorney by John D. O'Hair, pro se, Timothy A Baughman, and Jeffrey Caminsky; for Americans for Effective Law Enforcement, Ine., et al. by Wayne W. Schmidt, James P. Manak, and Richard Weintraub; for the Criminal Justice Legal Foundation by Kent S. Scheidegger and Charles L. Hobson; and for the National Association of Police Organizations et al. by Stephen R. McSpadden.
Briefs of amici curiae urging affirmance were filed for the American Civil Liberties Union et al. by Tracey Maclin, Steven R. Shapiro, Harvey Grossman, and Barbara E. Bergman; for the NAACP Legal Defense & Educational Fund, Inc., by Elaine R. Jones, Theodore M. Shaw, George H. Kendall, and Laura E. Hankins; and for the Rutherford Institute by John W. Whitehead and Steven H. Aden.
CHIEF Justice Rehnquist
delivered the opinion of the Court.
Respondent Wardlow fled upon seeing police officers patrolling an area known for heavy narcotics trafficking. Two of the officers caught up with him, stopped him, and conducted a protective patdown search for weapons. Discovering a .38-caliber handgun, the officers arrested Wardlow. We hold that the officers’ stop did not violate the Fourth Amendment to the United States Constitution.
On September 9, 1995, Officers Nolan and Harvey were working as uniformed officers in the special operations section of the Chicago Police Department. The officers were driving the last car of a four-car caravan converging on an area known for heavy narcotics trafficking in order to investigate drug transactions. The officers were traveling together because they expected to find a crowd of people in the area, including lookouts and customers.
As the caravan passed 4035 West Van Burén, Officer Nolan observed respondent Wardlow standing next to the building holding an opaque bag. Respondent looked in the direction of the officers and fled. Nolan and Harvey turned their ear southbound, watched him as he ran through the gangway and an alley, and eventually cornered him on the street. Nolan then exited his ear and stopped respondent. He immediately conducted a protective patdown search for weapons because in his experience it was common for there to be weapons in the near vicinity of narcotics transactions. During the frisk, Officer Nolan squeezed the bag respondent was carrying and felt a heavy, hard object similar to the shape of a gun. The officer then opened the bag and discovered a .38-caliber handgun with five live rounds of ammunition. The officers arrested Wardlow.
The Illinois trial court denied respondent’s motion to suppress, finding the gun was recovered during a lawful stop and frisk. App. 14. Following a stipulated bench trial, Wardlow was convicted of unlawful use of a weapon by a felon. The Illinois Appellate Court reversed Wardlow’s conviction, concluding that the gun should have been suppressed because Officer Nolan did not have reasonable suspicion sufficient to justify an investigative stop pursuant to Terry v. Ohio, 392 U. S. 1 (1968). 287 Ill. App. 3d 367, 678 N. E. 2d 65 (1997).
The Illinois Supreme Court agreed. 183 Ill. 2d 306, 701 N. E. 2d 484 (1998). While rejecting the Appellate Court’s conclusion that Wardlow was not in a high crime area, the Illinois Supreme Court determined that sudden flight in such an area does not create a reasonable suspicion justifying a Terry stop. 183 Ill. 2d, at 310, 701 N. E. 2d, at 486. Relying on Florida v. Royer, 460 U. S. 491 (1983), the court explained that although police have the right to approach individuals and ask questions, the individual has no obligation to respond. The person may decline to answer and simply go on his or her way, and the refusal to respond, alone, does not provide a legitimate basis for an investigative stop. 183 Ill. 2d, at 311-312, 701 N. E. 2d, at 486-487. The court then determined that flight may simply be an exercise of this right to “go on one’s way,” and, thus, could not constitute reasonable suspicion justifying a Terry stop. 183 Ill. 2d, at 312, 701 N. E. 2d, at 487.
The Illinois Supreme Court also rejected the argument that flight combined with the fact that it occurred in a high crime area supported a finding of reasonable suspicion because the “high crime area” factor was not sufficient standing alone to justify a Terry stop. Finding no independently suspicious circumstances to support an investigatory detention, the court held that the stop and subsequent arrest violated the Fourth Amendment. We granted certiorari, 526 U. S. 1097 (1999), and now reverse.
This case, involving a brief encounter between a citizen and a police officer on a public street, is governed by the analysis we first applied in Terry. In Terry, we held that an officer may, consistent with the Fourth Amendment, conduct a brief, investigatory stop when the officer has a reasonable, articulable suspicion that criminal activity is afoot. 392 U. S., at 30. While “reasonable suspicion” is a less demanding standard than probable cause and requires a showing considerably less than preponderance of the evidence, the Fourth Amendment requires at least a minimal level of objective justification for making the stop. United States v. Sokolow, 490 U. S. 1, 7 (1989). The officer must be able to articulate more than an “inchoate and unparticularized suspicion or ‘hunch’” of criminal activity. Terry, supra, at 27.
Nolan and Harvey were among eight officers in a four-car caravan that was converging on an area known for heavy narcotics trafficking, and the officers anticipated encountering a large number of people in the area, including drug customers and individuals serving as lookouts. App. 8. It was in this context that Officer Nolan decided to investigate Wardlow after observing him flee. An individual’s presence in an area of expected criminal activity, standing alone, is not enough to support a reasonable, particularized suspicion that the person is committing a crime. Brown v. Texas, 443 U. S. 47 (1979). But officers are not required to ignore the relevant characteristics of a location in determining whether the circumstances are sufficiently suspicious to warrant further investigation. Accordingly, we have previously noted the fact that the stop occurred in a “high crime area” among the relevant contextual considerations in a Terry analysis. Adams v. Williams, 407 U. S. 143, 144, 147-148 (1972).
In this case, moreover, it was not merely respondent’s presence in an area of heavy narcotics trafficking that aroused the officers’ suspicion, but his unprovoked flight upon noticing the police. Our cases have also recognized that nervous, evasive behavior is a pertinent factor in determining reasonable suspicion. United States v. Brignoni-Ponce, 422 U. S. 873, 885 (1975); Florida v. Rodriguez, 469 U. S. 1, 6 (1984) (per curiam); United States v. Sokolow, supra, at 8-9. Headlong flight—wherever it occurs—is the consummate act of evasion: It is not necessarily indicative of wrongdoing, but it is certainly suggestive of such. In reviewing the propriety of an officer’s conduct, courts do not have available empirical studies dealing with inferences drawn from suspicious behavior, and we cannot reasonably demand scientific certainty from judges or law enforcement officers where none exists. Thus, the determination of reasonable suspicion must be based on eommonsense judgments and inferences about human behavior. See United States v. Cortez, 449 U. S. 411, 418 (1981). We conclude Officer Nolan was justified in suspecting that Wardlow was involved in criminal activity, and, therefore, in investigating further.
Such a holding is entirely consistent with our decision in Florida v. Royer, 460 U. S. 491 (1983), where we held that when an officer, without reasonable suspicion or probable cause, approaches an individual, the individual has a right to ignore the police and go about his business. Id., at 498. And any “refusal to cooperate, without more, does not furnish the minimal level of objective justification needed for a detention or seizure.” Florida v. Bostick, 501 U. S. 429, 437 (1991). But unprovoked flight is simply not a mere refusal to cooperate. Flight, by its very nature, is not “going about one’s business”; in fact, it is just the opposite. Allowing officers confronted with such flight to stop the fugitive and investigate further is quite consistent with the individual’s right to go about his business or to stay put and remain silent in the face of police questioning.
Respondent and amici also argue that there are innocent reasons for flight from police and that, therefore, flight is not necessarily indicative of ongoing criminal activity. This fact is undoubtedly true, but does not establish a violation of the Fourth Amendment. Even in Terry, the conduct justifying the stop was ambiguous and susceptible of an innocent explanation. The officer observed two individuals pacing back and forth in front of a store, peering into the window and periodically conferring. 392 U. S., at 5-6. All of this conduct was by itself lawful, but it also suggested that the individuals were casing the store for a planned robbery. Terry recognized that the officers could detain the individuals to resolve the ambiguity. Id., at 30.
In allowing such detentions, Terry accepts the risk that officers may stop innocent people. Indeed, the Fourth Amendment accepts that risk in connection with more drastic police action; persons arrested and detained on probable cause to believe they have committed a crime may turn out to be innocent. The Terry stop is a far more minimal intrusion, simply allowing the officer to briefly investigate further. If the officer does not learn facts rising to the level of probable cause, the individual must be allowed to go on his way. But in this case the officers found respondent in possession of a handgun, and arrested him for violation of an Illinois firearms statute. No question of the propriety of the arrest itself is before us.
The judgment of the Supreme Court of Illinois is reversed, and the cause is remanded for further proceedings not inconsistent with this opinion.
It is so ordered.
The state courts have differed on whether unprovoked flight is sufficient grounds to constitute reasonable suspicion. See, e. g., State v. Anderson, 155 Wis. 2d 77, 454 N. W. 2d 763 (1990) (flight alone is sufficient); Platt v. State, 589 N. E. 2d 222 (Ind. 1992) (same); Harris v. State, 205 Ga. App. 813, 423 S. E. 2d 723 (1992) (flight in high crime area sufficient); State v. Hicks, 241 Neb. 357, 488 N. W. 2d 359 (1992) (flight is not enough); State v. Tucker, 136 N. J. 158, 642 A. 2d 401 (1994) (same); People v. Shabaz, 424 Mich. 42, 378 N. W. 2d 451 (1985) (same); People v. Wilson, 784 P. 2d 325 (Colo. 1989) (same).
We granted certiorari solely on the question whether the initial stop was supported by reasonable suspicion. Therefore, we express no opinion as to the lawfulness of the frisk independently of the stop.

Question: What is the court in which the case originated?

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Answer: 159