He was, however, apparently unarmed.
This is my rifle...
Unarmed doesn’t always make a difference. Years ago there was a big time 300+ lb college football player who went psychotic and beat a woman almost to death. The coach and supporters got him off with “supervised” psychological “treatment” and he continued to play. The coach promised the judge that he would strictly supervise the guy. A few months later the player is once city over, naked and rampaging through a neighborhood trying to knock down doors and kill people. The two cops arrived and attempted to calm him down but he rushed them both of them and they found themselves fighting for their lives with a naked, 300 pound guy. He got one cops weapon and in the struggle to take it back from him he was shot. He was paralyzed and oh boo hoo couldn’t play ball anymore so he tried to sue the cops and the city, and lost. The cops could have been justified in shooting him outright but did not. Depending on the circumstances, the civilian shooter may well have been justified. Whether or not it will be adjudged that way is another matter.