And right after that, the other dep. has to do a mag change, runs out of the frame presumably behind his vehicle, and then comes up behind the perp and dumps 15 rounds into him.
All of that is just the fog of battle.
The mistake was getting so comfortable with a carload of hooligans, and leaving the dude alone in the car in the first place.
Whole thing made me cringe. I think those deputies were near-victims of the Black Lives Matter scourge. Nobody wants to be "that guy" who ends up on Youtube, then out of a career or even in court over an incident with a lousy hoodrat. So they slack with the kinder-gentler contact tactic, instead of sticking to and following procedure that would bring the scene under safe control first and foremost.