Synopsis

What drives someone to enter a theater, a place of worship, or a classroom brimming with students and unleash a torrent of violence? What confluence of factors can compel a human being to commit such an abhorrent act? Can scientific inquiry illuminate these horrific events and offer insights into preventing them? As the nation grapples with the tragedy in Newtown, NOVA correspondent Miles O’Brien distinguishes fact from speculation, exploring emerging theories that the most devastating rampage k