He was fleeing the cops, he was not in any way an immediate threat to them. (I realize the taser was in play, but I am playing the role of the opposing lawyer). In the video footage it was clear he was running * away * from both the Wendy's itself and the cars in the drive through line. He appeared to be only trying to flee the police.
I'm not trying to troll you, honest to god on my mother's eyesight, I am only trying to convey how opposing lawyers would/will attack this cop. If he * clearly * wasn't trying to stop an * immediate * act of violence, the lawyer will have a field day. Please do not get me wrong, appeal to authority aside I have horror stories from the Detroit PD... Cops have horrifically shitty jobs if they are stuck in high crime areas. Now corrupt assholes always exist, but generally speaking, decent cops have to be borderline saints in an era of ubiquitous video footage. None of that changes the fact that ANY shooting in the back is going to be bad news for the cop.