Illegal (w/Edward G. Robinson and DeForest Kelley, 1955).

Edward G. Robinson and Nina Foch
in Illegal (1955)

In Illegal, district attorney Edward G. Robinson convicts an innocent man (DeForest Kelley) and becomes entangled with racketeers. Costars include Nina Foch, Hugh Marlowe, Edward Platt (of Get Smart fame), and Jayne Mansfield. The director is Lewis Allen (The Uninvited, The Unseen, Appointment with Danger, etc.). One of the film's screenwriters is W. R. Burnett (Little Caesar, High Sierra, etc.), adapting Frank J. Collins's play The Mouthpiece (allegedly based on William J. Fallon, a former Westchester [NY] prosecutor and lawyer for Arnold Rothstein and Nicky Arnstein, who was dubbed "The Great Mouthpiece" by the press).