Terry v. Ohio, 392 U.S. 1 (1968), was a landmark 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 violated 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."
investigative stop...A brief stop that is not intrusive. In order to conduct such a stop, a police officer must have reasonable suspicion that a crime been committed. This reasonable suspicion must be based on specific and articulable facts. criminal law and procedure.
Reasonable suspicion is a legal standard of proof in United States law that is less than probable cause, the legal standard for arrests and warrants, but more than an "inchoate and unparticularized suspicion or 'hunch'
Suspicious Activity Reports can cover almost any activity that is out of the ordinary.
