Connecticut State Police Lieutenant Paul Vance (C) addresses the media about the investigation into the mass shooting at a Newtown, Connecticut elementary school, on December 15, 2012. Vance indicated... more 

Connecticut State Police Lieutenant Paul Vance (C) addresses the media about the investigation into the mass shooting at a Newtown, Connecticut elementary school, on December 15, 2012. Vance indicated that police are homing in on the mystery of what triggered the massacre of 20 children and six adults by a young lone gunman less