The recent murder-suicide of pro wrestler Chris Benoit was quite a shocker to the entertainment world. Why did someone who had everything in the world to live for kill his family and then himself? A doctor says he may have the answer.

A physician who recently examined Benoit's brain said that the wrestler suffered extensive brain damage from his years throwing and being thrown inside a wrestling ring, and that fact may have contributed to the wrestler's deadly rampage.

Did multiple concussions make Benoit go over the edge? As the doctor indicated, the human brain was not meant to be constantly knocked around and the skull was not meant for breakage multiple times. In Benoit's case, that odd fame from entertainment-style wrestling may have done him -- and his family -- in long before their time.