At the beginning of the film, Johnny goes to the office and pulls out Laura's file and opens it. Upon sitting down at the desk, he opens the folder again.
When Johnny returns to his apartment after visiting the parole office, he leaves the door open, noticing something amiss. But, in the next shot from inside the apartment, the door is closed behind him.
On Laura's record, it lists her date of birth as 1927 and the date of her arrest as November 7, 1943. That would mean she was Johnny's girlfriend at age 16 or even 15, but her age is listed as 20 on the card - which would make it 1947 (the year this film was made). And, if she was 15 or 16 at the time of her crime, she wouldn't have been sent to the women's prison at Tehachapi.
When Bob Webster is released from prison, as he walks up to the car, a moving shadow of the boom microphone is visible along the roof-line of the vehicle.