Factual error: In the opening scene when the guys are shooting craps, Little Quick shoots the large man squarely between the eyes. The man wasn't looking downward and it would have been impossible for a 4 foot tall kid to shoot a 6 foot tall man at that angle squarely in the forehead.
Revealing mistake: In the fight scene in the Alley you can tell in all the shots from behind they woman is a much younger and smaller stunt double. (00:22:30)
Continuity mistake: Quick is wearing a grey overcoat and hat when he jumps from his car, but was wearing a white hat and overcoat when he left Calhoune's place and drove away.
Factual error: When Ray and Annie are lying in bed talking about Quick they're listening to a song (Just One More Chance by Billie Holiday) that was recorded in 1959, however the movie is set in the 1930s. (00:33:39 - 00:35:40)
