noun
police officer, policeman, agent, plainclothesman, private investigator, private eye*, narcotics agent, police sergeant, FBI agent, Scotland Yard man, sleuth, shadow*, P.I., operative, wiretapper, polygraphist, investigator, criminologist, member of a crime detection squad, analyst, prosecutor, patrolman, eavesdropper, spy, reporter, shamus*, newshound*, minion of the law*, gumshoe*, flatfoot*, dick*, bloodhound*, hawkshaw*, Sherlock*, bull*, G-man*, copper*, cop*, fed*, narc*, slewfoot*, bug artist*, tail*; see also agent 1, police officer.