In Johnny's vision when the clerk is shot, the bullets fired are shown in slow motion and they are clearly full metal jacket rounds. From the large caliber revolver used the bullets would have passed through the clerk's shoulder and impacted the door behind him. When the clerk collapses the door is unmarked.
The police reports and witness affidavit that Johnny Smith touches to discover the inconsistency with the witness's testimony about the number of cars in the parking lots are hearsay, and would not have been admitted as evidence for the jury to examine.