The Threat (1960 film)
The Threat is a 1960 American crime film directed by Charles R. Rondeau, written by Jo Heims, and starring Robert Knapp, Linda Lawson, Lisabeth Hush, James Seay, Mary Castle and Barney Phillips. It was released by Warner Bros. on March 12, 1960. Plot. Hotheaded cynical loner cop Steve Keenan (Robert Knapp) starts getting anonymous threats from someone who is upset with the fact that he killed a gangster kingpin in self-defense. Steve is casually seeing a beautiful torch singer named Gerri (Linda Lawson), who is in love with him and wishes he would commit to  her. Steve is hesitant to do that, because he is still feeling burned about his ex Laura (Mary Castle) leaving him and taking up with the now-deceased gangster. His brother (and fellow cop) Harry (James Seay) tries to get him to take the threats seriously, but he just brushes them off until things start taking a deadly turn...