Maybe this was Suicide by Baldwin?
Doesn’t change the fact he pulled the trigger and killed her, but that’s the only thing that makes sense to me. Otherwise who the hell allowed live ammo to be loaded into that gun?
The crew were plinking with it after hours. Morons. There should never have been live ammo anywhere near the set. The armourer was incompetent to say the least. That unfortunately is to be expected from film school leftists.