Adam Lanza

Flowers, candles and stuffed animals at a makeshift memorial in Newtown, Conn., the week after 20 children and 6 adults were killed at Sandy Hook Elementary School. Eric Thayer/Reuters/Landov hide caption

An image from a Connecticut State Police report on the shootings at Sandy Hook Elementary School shows a scene at 36 Yogananda St. in Newtown, Conn., where Adam Lanza killed his mother before driving to the school and killing 26 students and staff last December. AP hide caption

Dec. 18, 2012: Crime scene tape stretches across the property outside the home where Adam Lanza lived with his mother, Nancy Lanza. Inside, police found weapons and other evidence. Lucas Jackson /Reuters /Landov hide caption

Remembering the victims: Earlier this month, two mourners paused at a makeshift memorial in Newtown, Conn., for the children and adults killed at Sandy Hook Elementary School. Zhang Chuanshi /Xinhua /Landov hide caption

Candles with the names of victims of the Sandy Hook Elementary School shooting, at a makeshift memorial near the entrance to the grounds of Sandy Hook Elementary School. Brendan Smialowski /AFP/Getty Images hide caption

Nancy J. Lanza, mother of suspected mass shooter Adam Lanza, was one of the 26 victims of the mass shooting on Friday. Handout/Courtesy of family of Nancy Lanza via Getty Images hide caption