Would you expect to be shot in the head? None of what you just described, even the parts that didn't happen, does not represent a threat to the officer's life or safety, and don't justify being killed.
Oh yes, everything I said happened, everything! A LEO has a responsibility to..... here are the operative words.......serve and “PROTECT” and that doesn’t mean protect themselves. So what did you want the cop to do? Give him a warning without knowing anything about him, turn him loose and let him drive his car a couple of miles into a crowded sidewalk and kill a few people? Sorry, the perp escalated the situation, he grabbed the cops arm, turned the ignition on and put the car in drive. He was fleeing and the question to you is.........WHY?