If you liked this movie, you should also see: The Big Heat (1953)Kiss Me Deadly (1955)Key Largo (1948)The Letter (1940)Angels with Dirty Faces (1938)
When a mobsters wife decides to testify against his evil deeds she goes undercover to avoid being killed. Now that he's coming to trial she has to be escourted across country via train in order to testify. Cop Walter Brown and his partner are assigned the task, but the mob are on their trail.