I don't think you should ban cops from using tasers. What's the statistics on how many lives it's saved through it's use (instead of a gun) You have to give law enforcement something to subdue a potential criminal with. The use of tasers I would suspect, has saved many more lives than it took.
I am not condoning the right to use it (or any other weapon) when someone is running, unarmed,
and not threatening deadly force.
I'm simply stating that the use of it across the country has saved more lives than it took, and allowed Police to take into custody people that may have harmed themselves, others, or the cops themselves.