If I may add one thing and that is regardng the murder/suicide. What you must take into account is his brain damage, this was equally true of Chris Benoit if his name doesn't ring a bell, he was a great wrestler. Their brains were so damaged that after death when they were scanned under MRI it showed that they had as much brain deterioration as a 70 year old Alzheimer patient.

I'm trying to word this as best as I can but essentially the brain damage was responsible for the massive mood swings, the aggression, and depression. After all your brain governs all your actions and if it is severely damaged then the results can be quite tragic. I think the real culprit are the people that allowed him to fight when his [Valero] brain health was in doubt.

That aside, I think he had an underrated defense as he didn't really get hit that much.