Police Lt. William P. Harley
William Joseph 'Honeyboy' Willard
Gladys Harley
Henry Abel 'Hank' Smith
Joan MacNamara
Daisy (as Suzy Marquette)
Eddie Olsen (as Joseph Turkel)
Al Olsen
Thomas Allen 'Killer' Burke
Tom Olsen (as Dirk London)
Nun
Laurence Orlofsky
Dr. Riordan
Police Commissioner
Licovetti
Self in Prologue (as Congressman James Roosevelt)
Citizen (uncredited)
Police Officer (uncredited)
Judge Stone (uncredited)
Policeman George Murphy (uncredited)
Policeman at Call Box (uncredited)
Police Detective (uncredited)
Martha (uncredited)
Hood in Montage (archive footage) (uncredited)
Harry Keys (uncredited)
Policeman (uncredited)
Minor Role (uncredited)
Castiglione (uncredited)
Police Desk Sergeant (uncredited)
Al Capone (voice) (uncredited)
Wright (uncredited)
Florist (uncredited)
Gang Member (uncredited)
Man at Line-Up (uncredited)
Joe Milford (uncredited)
Ricco (uncredited)
Fish Scofield (uncredited)
Man in Judge's Office (uncredited)
Mac--Panhandler / Undercover Man (uncredited)
Ely (uncredited)
Irving Mills (uncredited)