Rogue Cop

Rogue Cop is a 1954 film noir directed by Roy Rowland, based on the novel by William P. McGivern, and starring Robert Taylor, Janet Leigh, and George Raft.

In a penny arcade, a drug dealer is stabbed to death by a man who claims the territory for himself, and Eddie witnesses a gangland murder. Mob boss Dan Beaumonte gives orders to Kelvaney to buy his brothers silence. Eddie refuses, and Kelvaney is unable to persuade Eddies sweetheart, nightclub singer Karen Stephenson, to change his mind.The ruthless Beaumonte brutally mistreats his moll Nancy Corlane, who then tries to help Kelvaney do what he has to do. Kelvaney exposes the fact that Karen was once a mobsters girlfriend in Miami. He gets her to admit that shes not in love with Eddie and is willing to let him go if it will save his life. ........

Source: Wikipedia