Um, no, not necessarily, and not usually.
A few days ago in the wake of this incident, I read an article where the Supreme Court ruled on this type of matter some years ago, and declared a cop could shoot a fleeing suspect...even if the suspect might not be armed.
But even if they hadn't ruled on it or said it was legal, if I put a beating on a cop, take the cop's gun or taser and use it on the cop, then run, like I said, I shouldn't be surprised if the cop takes a shot at me.