Yeah, I just think of those cops that shot a guy who got out of his car with his wallet in his hand.
It's night, it's dark, you see him reach for something even though you told him to keep his hands up, he produces a dark object from behind him... do you wait to see if he kills you/your partner before acting? Or do you shoot?
Cameras say "look, it was obviously his wallet!" when the headline told you it was a wallet, and you got to watch it until you saw it. In that moment though... could they have known?