After Kansas City Chiefs' linebacker Jovan Belcher killed his girlfriend and himself people started linking that to possible post concussion syndrome and the professional wrestler Chris Benoit who killed his family and himself. These two incidents lead people to believe that maybe steroids and/or concussions can make people mentally unstable. While that may be true, you have to remember that these are two incidents. Clearly the magnitude of a man killing his family is nothing to be understated, but if concussions and steroids were to blame then this shit would be happening with athletes all over the world from basketball leagues to boxing. I think that's an important thing to note when we try to place the blame anywhere else than on the actual man who commits these acts.