Continuity mistake: In the final scene at the sheriff's office, Mitchum has his feet up on the table top, and the boot soles are clean. But after Wayne walks out, there is suddenly a spot on a boot sole. (This is visible in the video)
Continuity mistake: When Belle Armitage first shoots her pistol at Johnny Finger, she drops it down the front of her dress. Seconds later, it reappears up between her ample bosom.