Steve London
Jack Rossman / Jack Rossman (uncredited)

Robert Stack
Eliot Ness

Nicholas Georgiade
Enrico Rossi

Paul Picerni
Lee Hobson

Abel Fernandez
William Youngfellow

Walter Winchell
Narrator

Frank Wilcox
Beecher Asbury / Beecher Asbury (uncredited)

Dick Cherney
Police Officer (uncredited) / Diner Patron (uncredited) / Party Guest (uncredite...

Anthony George
Cam Allison Jr.

Lovyss Bradley
Matron (uncredited) / Matron / Diner Patron (uncredited) / Neighbor (uncredited)...

Richard Reeves
Bartender (uncredited) / Hugger Davis / First Trucker / Abe Landau (uncredited) ...

Charles Sherlock
Police Photographer (uncredited) / Trial Spectator (uncredited) / Spectator at M...

Harold J. Stone
Adam Stone / Charles 'Pops' Felcher / Tommy Karpeles / Barney Jarreau / Louie Ma...

Cyril Delevanti
News Vendor (uncredited) / Flophouse Manager (uncredited) / Museum Night Watchma...

Frank De Kova
Anthony 'Tough Tony' Lamberto / Louie Campagna / The Man / Louis 'Little New Yor...

Dale Van Sickel
Police Officer (uncredited) / Sheriff Munie (uncredited) / Running Racetrack Cop...

Eugene Iglesias
Mendez / Emilio / Tony Cestari / George Karig

Robert Middleton
Mayor Anton J. Cermak / Mayer Wartel / Barney Loomis

Joe Turkel
Garvin / Deuces Kobler / Birdie Yates / Gobo Karsh

Richard Bakalyan
Benno / Cully / Prisoner (uncredited) / Joe Courtney