I can pretty much assure you I am not going to reload, walk up to someone laying on the ground and put five more into them. I'm going to tie them up so they don't get away, call 911, put the gun down and move away from it. That way the police don't walk up with me holding it and have to be on the defensive right away.
Going back and shooting him again was no bueno.
He should have shot him 3 times right off the bat to finish him.
I feel bad the kid died, I really do. But he deserved it nonetheless.