it is.
and harkens back to my point that if i were an officer i would no doubt revert to my training when handling an incident. if this officer's early induction into policing was through such a badly run department it''s less surprising, though NOT conclusive, that his actions might prove to have been unacceptable.
Every police department in the US, so far as I'm aware, teaches its officers to shoot to kill, if it becomes necessary to shoot. The training is standard across the nation, so far as I know.