No, because excuses can rarely be made for murder. There have always been murderers, and there always will be. Nothing will stop it. Sometimes there is simply evil in the world. Study CTE all you want, but Hernandez is a unique case. The guy already had a track that spoke for itself.
There is no need to explain what "made a bad guy worse". It reminds me of the 60 minute specials where they profile a murderer. They always point to something that scarred the person during their childhood. We all have these issues in our life, while some may be much worse than others, they are still no excuse. There has to be evil within someone to do such a thing imo. Much of this just comes down to personal beliefs imo.