Corrected entry: In the concluding moments of the film (and during the closing credits) the police officers and detectives investigating the murder act rather strangely. After the victim's car is dragged out of the swamp, even though they now know that the body is in the car's trunk, no one bothers to open the trunk. No one even pays much attention to the car. The tow truck just hauls the vehicle away with the body still crumpled up inside. The car is pulled out of shot for a moment, but it's not a long enough period of time for the trunk to have been opened or for the body to have been removed. This may simply be a very poorly run police force. Most police operations would have remained on the scene for hours more and a coroner would have been present.
Corrected entry: When Norman is putting Marion's body in the trunk of the car, it's almost dawn, but, when he's sinking the car in the swamp it's late night again.
Corrected entry: After Marion is stabbed in the shower at Bates' Motel, she slides down the wall inside the bathtub As her shoulder moves, the wall has blood on it behind her. In the next sequence, when she falls over, the blood is not on the wall anymore.
Corrected entry: When Norman is getting ready to push the car into the swamp, the car's left taillight is already halfway filled with water.