Yeah except they were in his house committing a crime???
But people that are incapacitated are not a threat to you. The girl was shot twice. He drug her over to a tarp and put the gun under her chin and pulled the trigger. That’s murder. Self defense is not just about killing. It’s stopping a threat. If the attacker is killed during the self defense, that’s what makes it ok and legal. If they are injured and can’t move, they are no longer a threat to you. Now it’s time to render aid and call the police. You don’t execute them on the spot. That’s why we have jails and prisons. That’s why we have courts. It’s why the bad guys aren’t arrested and shot in the street.
What smith did was a crime. Yes, the kids shouldn’t have been in his house. But teenage breaking and entering is not a capital offense.