Adam Lanza was the perpetrator of the December 14, 2012 massacre at Sandy Hook Elementary School in Newtown, Connecticut, in which he killed 27 people and injured at least 20 more. After killing students and administrators, he commited suicide. His brother, Ryan Lanza was taken into custody for questioning. Lanza's mother, Nancy Lanza, was shot by Lanza at his house in Newtown, CT. The school's prinicipal, Dawn Lafferty Hochsprung and the school's psychologist, Mary Sherlach were also killed. 20 children were murdered in the shooting.