It's murder. I don't really feel much sympathy for the kid though, or any anger towards the guy. It's just, matter-of-factly, murder. I think he was angry and he wanted that guy dead and it's not very often you get to shoot people. But yet, I wouldn't feel in danger with that guy living in my community. The only threat he poses to is armed criminals, which makes he ultimately a positive force, even if his actions are, picked apart, negative.
Just think if he didn't finish the guy off. Now that guy is nursed back to health in an expensive hospital, given an expensive trial and then put into an expensive jail. I feel kinda "meh" about it. I'm not saying I'd have shot him myself or I'd say he should get the death penalty for armed robbery. I'm just pointing out that I don't particularly care he's dead. Society is better off and he brought it on himself.
This "gun nut" justified his own damn gun purchases. He protected himself and his place of business. Getting shot during a robbery also is a deterrant that actually works unlike prison for the most part.
I know what he did was against the law but I think it's a bad law. It's bad because while there's a 95% this guy knew he was not in danger when he shot the robber... there's a 5% chance he wasn't sure. To me, if he THINKS he's still in danger, he can do ANYTHING to the robber to protect himself. End of story, that's basic common sense. If there's even 1% that he thinks he's still in danger, I'm all for letting him walk scott free. And there is.
Now there can be 100% he knows he wasn't in danger, at which point... no you can't kill him. You can't tie him up and execute him with his hands tied behind his head. You can't throw him in a padded room and gas him... it's not like that... I mean... he can be down, his eyes closed and you can see him as a danger.
People pretend to be down. People suddenly wake up. People pretend to be unconscious or dead. People who are even fatally wounded don't usually die instantly. That's why you're trained to shoot to kill generally. If you're shooting already, you want the person dead. 2 in the chest, 1 in the head. This philosophy is adapted because of drawn out fire fights where good guys were needlessly killed because of bullet riddled guys.
Fact is, you shoot me, I fall down. You don't know anything. You don't know if I'm alive. You don't know if I'm playing possum. You don't know if I've armed to the teeth down there and waiting to pounce you. Guy needed him dead to feel safe.