Sounds like he talked too much. You know when questioned they’re going to ask you tricky little things to trip you up and make a case against you. Just say “My life was threatened and I reacted and acted until I no longer felt threatened”. Then ask for your lawyer.
In this case, just firing multiple times is not out of the ordinary. Nothing say’s I need to shoot to maim first or I can only fire one shot or I have to fire a warning shot. That being said, there is no reason for a ‘good clean finishing’ shot when the victim is immobilized.
ABCS .... Assess, breath, control, shutup.
Yes and No. The facts at the scene of the shooting raised questions that had to be answered. His answers to those questions were a bit much.
He did himself no favors there, but the evidence of an execution-style shot would've sunk him even if he'd kept quiet.