Hm, I would say that the definition of autism needs to be clinically narrowed and pinpointed a lot better than it is now for that article to have any validity. Of course mass murderers are going to have a greater number of personality issues or stressors. I would venture a guess that most of the people in this "study" had co-morbidity: many more issues than just autism, in most cases probably three or more red-flag conditions predisposing them to violence.