http://www.cnn.com/2013/11/19/justic...merman-arrest/
http://www.cnn.com/2013/11/18/justic...est/index.html
He knows how to use the system. He's already killed one person, and his girlfriend almost joined that list. Listen to both 911 calls. His girlfriend is freaking out as he destroys their residence and then tries to frame her. He calculated it down to the last detail.