Terry v. Ohio, in 1968, was a major decision of the Supreme Court of the United States in which the Court ruled that the Fourth Amendment's prohibition on unreasonable searches and seizures is not in violation when a police officer stops a suspect on the street and frisks him or her without probable cause to arrest, if the police officer has a reasonable suspicion that the person has committed, is committing, or is about to commit a crime and has a reasonable belief that the person "may be armed and presently dangerous."
