In the wake of the mass killings at Sandy Hook Elementary School, this program investigates a young man and the town he changed forever. Adam Lanza left behind a trail of death and destruction, but little else. He left no known friends, no diary. He destroyed his computer and any evidence it might have provided. His motives, and his life, remain largely a mystery. This program looks for answers to the central - and so far elusive - question: who was Adam Lanza? Also explores how those closest to the tragedy are now wrestling with the issue of gun culture and laws. *Closed Captioned