– "He was singularly focused and obsessed with mass murders," the FBI writes about Adam Lanza in a newly unsealed interview. The New York Daily News reports the FBI released more than 1,500 pages of documents on the Sandy Hook Elementary shooting Tuesday. Most of the heavily redacted files consist of grand jury subpoenas and interviews with neighbors and others regarding the shooter, Adam Lanza, who killed 26 people, including 20 first-graders, according to the Hartford Courant. Lanza, 20, killed himself during the 2012 shooting. Here are some of the details revealed in the unsealed documents: