So long, Tony Stewart

The camera that took the shots seen, was far away from the incident. That means the mic was also. That means, the engine you hear rev, was close to the mic not the Stewart car. The rev theory is very inconclusive. Also, at worst, Stewart was trying to just jesture back at the guy, he was not trying to run over the guy. This, at most, was negligent manslaughter, that would have never happened if the safty rule "stay in your car" was obsurved by the hot head victim. There are lessons to be learned from all this, but they won't bring the guy back, but they can stop the next altercation from becoming deadly.