Angels with Dirty Faces

Rocky Sullivan (James Cagney) and Jerry Connolly (Pat O'Brien) are childhood friends who robbed a railroad car as kids. Rocky saved Jerry's life during the chase by pulling him out of the way of a steam train while running from the guards that saw them. Rocky was then caught by the police, but Jerry - who could run faster - escaped. Rocky, after being sent to reform school, grows up to become a notorious gangster, while Jerry has become a priest.