"Dragnet" (1954) Starring & Directed by Jack Webb

Los Angeles police detective Sergeant Joe Friday hunts down the killer of a mobster, Miller Starkie, focusing on West Coast mafia second-in-command Max Troy (played by Harris). The vendetta between Friday and Troy becomes increasingly bitter and personal as the film proceeds, leading to a brawl at a private card game between Friday, Frank Smith, and several of Troy's henchmen. A policewoman (Robinson) infiltrates Troy's nightclub and is able to obtain vital information on the Starkie killing; Friday then gets additional evidence when an accomplice of Troy is sent out of state and killed, and the man’s wife breaks down and gives the police what they need to convict Troy.