Well-known philanthropist and deaf-mute John G. Harrison is identified leaving the scene of several murders but evades successful prosecution as there are hundreds of witnesses who have also seen him emceeing benefits at the exact same time as the murders.
| Actor | Role |
|---|---|
 Dick PurcellEdward Clarkk | Edward Clarkk |
 Joan WoodburyBarbara Mason | Barbara Mason |
 John HamiltonJohn G. Harrison | John G. Harrison |
 Warren HymerPolice Sgt. Pete Corrigan | Police Sgt. Pete Corrigan |
 Mantan MorelandNicodemus | Nicodemus |
 J. Farrell MacDonaldPolice Captain | Police Captain |
 Gayne WhitmanDistrict Attorney John W. Rogers | District Attorney John W. Rogers |
 Kenneth HarlanPolice Lt. Jim Brady | Police Lt. Jim Brady |
 George J. LewisKramer | Kramer |
 Karl HackettDefense Attorney | Defense Attorney |
 Harry DeppLester P. Cutler | Lester P. Cutler |
 Isabel La MalMrs. Rigby - Dave's Mother | Mrs. Rigby - Dave's Mother |
| RRobert CarsonDave Rigby | Dave Rigby |
 Frank EllisKelsey | Kelsey |
 Victor AdamsonCity Hall Janitor (uncredited) | City Hall Janitor (uncredited) |
| AArthur BerkeleyCourtroom Spectator (uncredited) | Courtroom Spectator (uncredited) |
 Jack CheathamBailiff (uncredited) | Bailiff (uncredited) |