It looks to me that the deputy was spooked for some reason and simply unloaded into the kid at first movement, which apparently was the kid beginning to turn around.
* * *
That was my initial take, that the deputy, who is a war veteran, might have some PTSD and be on the trigger-happy side because of it. His online stance of “take them out before they take you out” adds to my opinion that he was trigger-happy. (The other deputy, with several years’ experience although he was a trainee, did not shoot at all.) At a minimum, I’d like to see this guy off the street, and permanently at a desk job. I think he might honestly be guilty of manslaughter, though I doubt he’ll be convicted, if charged.
This guy should never have had a badge and gun.