The shooter was being physically dragged by the car, and was in immediate risk of losing his life.
Shot placement was adequate to remove the threat.
Sorry, using deadly force: ie, shooting someone, should be applied when a felony has been committed and someone’s life is on the line.
Read along very carefully: SOMEONE'S LIFE WAS ON THE LINE. That someone was the officer who was giving a lawful order, "STOP THE CAR" to a suspect attempting to flee after being caught red-handed in the commission of a crime.
Was there a felony being committed?
Yes, that felony even has a name, it's called attempted vehicular homicide.
Just because someone is standing in front of your car does not give you the right to run them over, nor do you have the right to run over a cop while fleeing a crime scene, even if he is standing in your open car door.