The Undercover Man 1949

Synopsis:

Frank Warren is a treasury agent assigned to put an end to the activities of a powerful mob crime boss. Frank works undercover, posing as a criminal to seek information, but is frustrated when all he finds are terrified witnesses and corrupt police officers.

Directed by: Joseph H. Lewis
Written by: Sydney Boehm & Jack Rubin & Frank J. Wilson
Runtime: 85 minutes
Tagline: TOLD WITH THE SNARL OF A MACHINE GUN!
Cast:
Glenn Ford
Glenn Ford
Frank Warren 
Nina Foch
Nina Foch
Judith Warren 
James Whitmore
James Whitmore
George Pappas 
Barry Kelley
Barry Kelley
Attorney Edward J. O'Rourke 
Frank Tweddell
Frank Tweddell
Inspector Herzog 
Howard St. John
Howard St. John
Joseph S. Horan