is a legal standard of proof E-in United States law E-that is less than probable cause E, the legal standard for arrests B and warrants E,, but more than an "inchoate and unparticularized suspicion or "hunch";I1] B it must be based on "specific and articulable facts", "taken together with rational inferences from those facts",{2] E and the suspicion must be associated with the specific individual. Consensual Encounter Probable Cause Exigent circumstances Reasonable Suspicion

The legal standard of proof you are describing is "Reasonable Suspicion." In United States law, reasonable suspicion is a standard used in criminal procedure. It is less than probable cause but more than just a hunch. It requires specific and articulable facts, along with rational inferences from those facts, that would lead a reasonable person to suspect that a crime has been, is being, or will be committed. This standard is often used by law enforcement officers to justify brief stops and detentions, such as a stop-and-frisk.