What is the definition of "reasonable suspicion" in criminal procedure?

Reasonable suspicion refers to a legal standard used in criminal procedure that allows law enforcement officers to briefly detain an individual for investigatory purposes, based on specific and articulable facts. This standard is lower than the "probable cause" required for arrests or obtaining warrants. It allows officers to act on their instincts when they have a reasonable belief that a person may be involved in criminal activity or pose a threat.

In practice, reasonable suspicion must be based on observable behaviors or circumstances that suggest that criminal activity may be occurring. For example, if an officer observes a person behaving suspiciously in an area known for drug activity, this might provide a basis for reasonable suspicion. Consequently, this standard justifies brief stops and limited searches, enabling officers to investigate further without needing to establish the higher threshold of probable cause.

The other options do not align with the correct definition of reasonable suspicion. It is not a standard for arrest, a requirement for obtaining a warrant, or a justification for lethal force, all of which involve different legal standards and considerations in criminal procedure.