Poohbah, sorry to see you join the ranks of those approving of this type of police killing. I had respected your opinion on many issues.
Two police officers are chasing a car thief on foot, ordering him to stop with guns drawn since he has a hand in his jacket pocket and won't comply with their orders.
One officer hears a gunshot and sees his partner fall to the ground.
He fires at the suspect thinking that the suspect has fired at his partner.
And you think this was a "police killing"?
You would have done the exact same thing.