Nothing happened. It was fake news as usual just as alot of the facts of this scenario are.
A taser isnt a deadly weapon in itself BUT it could disable the cop giving the suspect the opportunity to take his gun.
Yes, he was shot in the back. He turned, pointed the taser at the cop and as the cop took aim on him, he turned to run.
Suspect had a taser and was running towards people with children in the area who could have gotten hurt.
Yes, the cop did stand on his shoulder until he kicked the gun away from his reach. No way of knowing if the suspect would reach for it again.
I didnt see any video where a cop kicked him in the head. And I watched them all.
Bottom line. Cooperate and everyone goes home happy.