There are errors on Frank Olins' death certificate. The typed date of death is May 10 (with the year omitted); however, the handwritten date the attending physician (Craig) "last saw the person alive" is July 8, 1946. The time of death is typed in as 7 p.m., but the execution took place at 8 p.m. The entry for "Maiden name of mother" lists only "Bertha" instead of her full maiden name.
As shown on the EKG machine in the doctor's office, Olins had no heartbeat, so there was no way for the methylene blue to circulate and be effective as it was being administered by a gravity drip IV.
The floor in the apartment hallway runs directly into the open elevator with no break or threshold.
Dr. Craig, Margot, and Jim are stopped at a police roadblock on a lonely, dark road. When they leave, there is a cut-back to the inside of the car; the view through the back window shows they are still in the well-lit city with no roadblock behind them.
Jim shoots Frankie in the back room, and next Sgt. Portugal arrives ringing the bell. Lloyd goes to let him in, while Jim hides Frankie, himself, and Margot. BUT when Portugal gets to the back room he sees nothing out of the ordinary. However, it would be impossible to hide all of the forensics, particularly the blood of a murder, in such a short period of time.
Nighttime scenes were filmed using a filter to darken scenes. BUT this technique leaves the sky light when in fact the night sky should be dark. Further detail both near and distance is vivid when in fact it should fade, disappear, into the shadows and darkness of the background.
Frankie's map does not name the road to turn off the state highway, however Vincent knows it is 150 miles away in another town.
When Joe walks into the bar, he pauses by the piano. The piano player raises his left hand off the keyboard to wave to Joe, but the piano music continues as if both his hands are still playing.
Right at the beginning, when Dr Craig's reflection is seen on the mirror, the dark line behind him is a shadow from either the camera or a boom mic, as it moves when the camera pulls away.
Margot claims to have grown up in Lancashire, England, but her voice has no trace of a Lancastrian accent; it is rather that of someone from the south-east of England.
In Dr. Craig's office, when his nurse is walking toward him and expressing concern about his decision to abandon his practice for the weekend, the shadow of the boom microphone can be seen crossing the cloth screen next to the nurse.
As the camera dollies up on Sgt. Portugal as he reads the note taken from the money box, the shadow of the boom microphone can be seen to go across his face.
When the body is taken out of the prison, the guard fails to look inside of the coffin. A trained guard would have.
When Dr. Craig is sitting at his desk, a wedding ring can be seen on his left hand.