Terry further held that "[w]hen 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," the officer may conduct a patdown search "to determine whether the person is in fact carrying a weapon." 392 U. S., at 24. "The purpose of this limited search is not to discover evidence of crime, but to allow the officer to pursue his investigation without fear of violence . . . ." Adams, supra, at 146. Rather, a protective search--permitted without a warrant and on the basis of reasonable suspicion less than probable cause--must be strictly "limited to that which is necessary for the discovery of weapons which might be used to harm the officer or others nearby." Terry, supra, at 26; see also Michigan v. Long, 463 U.S. 1032, 1049, and 1052, n. 16 (1983); Ybarra v. Illinois, 444 U.S. 85, 93-94 (1979). If the protective search goes beyond what is necessary to determine if the suspect is armed, it is no longer valid under Terry and its fruits will be suppressed. Sibron v. New York, 392 U.S. 40, 65-66 (1968).
These principles were settled 25 years ago when, on the same day, the Court announced its decisions in Terry and Sibron. The question presented today is whether police officers may seize nonthreatening contraband detected during a protective patdown search of the sort permitted by Terry. We think the answer is clearly that they may, so long as the officer's search stays within the bounds marked by Terry.
We have already held that police officers, at least under certain circumstances, may seize contraband detected during the lawful execution of a Terry search. In Michigan v. Long, supra, for example, police approached a man who had driven his car into a ditch and who appeared to be under the influence of some intoxicant. As the man moved to reenter the car from the roadside, police spotted a knife on the floorboard. The officers stopped the man, subjected him to a patdown search, and then inspected the interior of the vehicle for other weapons. During the search of the passenger compartment, the police discovered an open pouch containing marijuana and seized it. This Court upheld the validity of the search and seizure under Terry. The Court held first that, in the context of a roadside encounter, where police have reasonable suspicion based on specific and articulable facts to believe that a driver may be armed and dangerous, they may conduct a protective search for weapons not only of the driver's person but also of the passenger compartment of the automobile. 463 U. S., at 1049. Of course, the protective search of the vehicle, being justified solely by the danger that weapons stored there could be used against the officers or bystanders, must be "limited to those areas in which a weapon may be placed or hidden." Ibid. The Court then held: "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." Id., at 1050; accord, Sibron, 392 U. S., at 69-70 (White, J., concurring); id., at 79 (Harlan, J., concurring in result).
The Court in Long justified this latter holding by reference to our cases under the "plain view" doctrine. See Long, supra, at 1050; see also United States v. Hensley, 469 U.S. 221, 235 (1985) (upholding plain view seizure in context of Terry stop). Under that doctrine, if police are lawfully in a position from which they view an object, if its incriminating character is immediately apparent, and if the officers have a lawful right of access to the object, they may seize it without a warrant. See Horton v. California, 496 U.S. 128, 136-137 (1990); Texas v. Brown, 460 U.S. 730, 739 (1983) (plurality opinion). If, however, the police lack probable cause to believe that an object in plain view is contraband without conducting some further search of the object--i.e., if "its incriminating character [is not] `immediately apparent,' " Horton, supra, at 136--the plain view doctrine cannot justify its seizure. Arizona v. Hicks, 480 U.S. 321 (1987).
We think that this doctrine has an obvious application by analogy to cases in which an officer discovers contraband through the sense of touch during an otherwise lawful search. The rationale of the plain view doctrine is that if contraband is left in open view and is observed by a police officer from a lawful vantage point, there has been no invasion of a legitimate expectation of privacy and thus no "search" within the meaning of the Fourth Amendment--or at least no search independent of the initial intrusion that gave the officers their vantage point. See Illinois v. Andreas, 463 U.S. 765, 771 (1983); Texas v. Brown, supra, at 740. The warrantless seizure of contraband that presents itself in this manner is deemed justified by the realization that resort to a neutral magistrate under such circumstances would often be impracticable and would do little to promote the objectives of the Fourth Amendment. See Hicks, supra, at 326-327; Coolidge v. New Hampshire, 403 U.S. 443, 467-468, 469-470 (1971) (opinion of Stewart, J.). The same can be said of tactile discoveries of contraband. If a police officer lawfully pats down a suspect's outer clothing and feels an object whose contour or mass makes its identity immediately apparent, there has been no invasion of the suspect's privacy beyond that already authorized by the officer's search for weapons; if the object is contraband, its warrantless seizure would be justified by the same practical considerations that inhere in the plain view context. [n.3]
