I agree with Greg. NONE of us were there. We don't know exactly what happened. We know what has been reported, but even that may turn out not to be accurate as the investigation proceeds. There are no winners in this situation. A teenager died. A family lost their son. And a trooper will likely be forever changed by this, in a terrible way.
Another thing, for those that are saying the cop shouldn't have shot him because "he was just a kid". Would the cop be any less dead if shot in the head (if the gun had been real), just because it was held by a teenager and not an adult?