fellow officer rule
fellow-officer rule. Criminal procedure. The principle that an investigative stop or an arrest is valid even if the law-enforcement officer lacks personal knowledge to establish reasonable suspicion or probable cause as long as the officer is acting on the knowledge of another officer and the collective knowledge of the law-enforcement office. — Also termed Whiteley rule. [Cases: Arrest 63.4(11). C.J.S. Arrest § 32.]
