Other mistake: When we see the shot couple in the pink car, there's blood spatter inside the windows and windshield, so that means the windows were up when they were shot, and they were shot in the car. It makes no sense that neither the windshield nor the windows are broken. If Jimmy shot them from the front, he would've had to have shot them through the windshield. If he shot them from the side, he would've had to have shot them through the window.
MikeH
22nd Dec 2017
Goodfellas (1990)
Upvote valid corrections to help move entries into the corrections section.
Suggested correction: This one is pretty weak. Jimmy knew them. He could have easily walked up to the door and opened it, as if to admire the car, as if to talk, or for any other reason, shot them, and closed the door.