Sandy Hook Shooter Hadn't Left Room in 3 Months: Docs

"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:

• A neighbor said FBI agents came to the Lanza home years before the shooting after Lanza hacked into a government computer system. The neighbor says Lanza's mother, Nancy, was told Lanza could have a future with the FBI.
• Another source told agents that Lanza had become seriously withdrawn before the shooting. He hadn't left his bedroom in three months and only communicated with his mother through email.
• A number of people said Storm Sandy deeply upset Lanza when it knocked power out for days. Despite lacking electricity, Lanza refused to leave his room and go to a hotel.

• Sources told the FBI Lanza "had no real friends," was "bullied, but not excessively," and was "the weirdest person online." An agent reported Lanza spoke of school shooters "with respect and understanding" and "devoted almost all his internet activity to researching and discussing mass murders and spree killings."
• One man told agents Lanza hated his teacher mother, who he killed prior to attacking Sandy Hook Elementary, because he thought she loved her students more than him.
• A family friend said Nancy Lanza planned to move her and Adam to Seattle in 2013, thinking it would be good for Adam.
• CBS News reports some neighbors told agents they'd gotten death threats after the shooting from a caller identifying himself as Adam Lanza.

(More Sandy Hook stories.)