Raising Adam Lanza

In the wake of the mass killings at Sandy Hook Elementary School, FRONTLINE investigates a young man and the town he changed forever. Adam Lanza left behind a trail of death and destruction, but little else. His motives, and his life, remain largely a mystery. In collaboration with The Hartford Courant, FRONTLINE looks for answers to the central, and so far elusive question: who was Adam Lanza?