And where was the threat later? When Scott was 15 or 20 feet from the officer and running away?
Fleeing police may be a felony but it does not carry a death sentence. Neither does physically resisting a police officer. Deadly force should be a last resort and used only to prevent death or injury to the officer or people in the surrounding area. No rational person could believe that Scott met that criteria. The officer acted in a reckless and criminal manner by shooting Scott. He fully deserves to be prosecuted for it.
He was stupid enough to get himself killed over a traffic violation. At the time of the shooting the officer didn’t know where the taser was or if the suspect had it. With a taser I can disable an officer and take his weapon away and even kill him with his own weapon. The suspect fully deserved to be shot, hell he was begging for by his own actions. Pizz on him.