I don't care, because that shouldn't even be the question. The real issue is why this matters to us as a society. This was excusable behavior when we were in intermediate school, when we passed notes to each other about Bubba calling out Buster fo' beef in the parking lot after sixth period. Ban pro boxing. Send pro boxing underground, where it belongs.
Kids learn to defend themselves by learning how to box.
People don't get killed in amateur boxing. They do in pro boxing. OK, there's the argument that there's nothing more basic in sport than two guys putting it on the line, punching each other out without wearing headgear. And sure, pro boxing has good people like Evander Holyfield and Oscar De La Hoya. When Tyson bit Holyfield's ear, he didn't do anything that any self-respecting street punk wouldn't.