This is why Joe.... Kind of like the mothers out there who for no known reason drown their kids, cut their kids arms off, throw their kids off a bridge, etc. Or the father who decides to shoot and kill his 6 year old daughter, shoot and wound his 13 year old daughter and then kill himself. He was described by his neighbors, friends and family members as a gentle, kind family man. Heck, he went to his 6 year old's school 2 days before and had lunch with her. Or how about the 70 year old man who was stopped by a Texas State Trooper and then gunned the Trooper down with a deer rifle. How many examples would you like? A person doesn't always have a history of violence or unusual behavior leading up to violence. It is usually those types that are the most dangerous and the most unpredictable.