Yeah. But if he thought he was protecting his own life, he did what any reasonable person in that spot would do - and he hit his target. Not his fault, but would pain the conscience of a person who has one.
As a former police officer in a large metropolitan area, I have seen this happen more than once. Most officers are ruined for lifer and usually turn in their shield soon after.
Many are scared for life and some take it to the extreme and eat their gun.