Lydia is referred to as "Lydia Stevens" by the other characters, but she is referred to as "Lydia Harris" in the narration.
When Ken Williams pulls up at Zober's house he noses in directly behind Dan Mathews' car. However, when he, Mathews, and Lydia leave he pulls forward away from the curb, which would've been impossible unless 1 of the 2 cars had been repositioned.
It would not be possible to shoot out a tire at the distance shown with a snub nose revolver without aiming.
The fact that Rita Hudson's car was sitting abandoned in front of the train station is never mentioned despite Sgt. Williams having gone to the station and investigated her disappearance. This would have contributed to the abduction theory as opposed to her being a part of the theft.
When Rita Hudson was initially restrained by the thieves, her coat was open. When the camera panned back to Rita her coat was closed without anyone touching it.
Matthews calls in the house as 1729 Front Street, yet moments earlier Lydia had walked past a street sign indicating the house was on Gardena Avenue before she entered the house.
Matthews makes a couple of errors at the end. When calling out to the suspects, he never identifies himself as a law enforcement officer prior to firing his gun. Next, he calls for an ambulance and coroner at his location but never gave his location.