As I've pointed out before, once Scott breaks contact and begins to run away, he is unarmed and not a threat to anyone in the immediate vicinity.
Yes, he may have just fought with a cop for a minute or more. But you can't use deadly force on someone, anyone, no longer an immediate threat.
That's why you have Motorola.
The bad thing is that crap like this just encourages people to resist even more. Once the officer says "you're under arrest", then it's game over. Shut up and cooperate. As our resident tilecrawlers will tell everyone; Argue in court, not on the street. It's hard to beat the rap if you are dead.