Agree with CheeseWiz, Nate and H/T. I don't have any problem with accepting the possibility that CTE was involved. But first, I don't understand why that is the default assumption. When any other person commits murder, especially of children, we say, "What a scumbag." We don't say, "Well, what was wrong with his brain that caused this?" I think we need to accept that there are terrible people in this world that do terrible things and this man was one of those people. It doesn't mean that there aren't circumstances and sometimes mental conditions that contribute to their actions, but that goes for basically any murderer. Almost no one wakes up one day and just decides to kill people in cold blood, there are circumstances that contribute to the action. But that doesn't make them any less culpable. And to Nate's point, this was an act that required pre-meditation. I am fine with admitting that there's a better than average chance that Phillip Adams never commits this act without him suffering from a TBI, but I will cannot accept that this makes him any less responsible for his actions. As humans we face many circumstances or mental conditions in life that can make us more prone to violence -- depression, anxiety, PTSD, among many other things. As long as we act under our own free will we still have a personal responsibility to not act on these tendencies.