This case is plainly a "dirty shoot" because the boy was told to get out of the car, and simply was unbuckling his seat belt: he was following directions and made no furtive movement.
This case must not stand.
It's more like it was "GET OUT OF THE F***ING CAR", being shouted by several JBTs at the top of their lungs.
It's also very possible that another agent was shouting "DON'T F***ING MOVE" to the kid, just to (intentionally) confuse the situation for the victim.
That way, if he didn't move they could shoot him for not "getting out of the f***ing car".
Is this a case where seat belts KILL ?
I dread the day when I get stopped. If by the time the officer comes to the door I have gotten and opened my wallet I would have had to undo my seat belt. Would I now be cited for a seat belt violation?