Smashed hard drive and gun safe found in Lanza room

Adam Lanza began his shooting spree by killing his mother at their Newtown home. Credit: REUTERS/Lucas Jackson

Police found a smashed computer hard drive along with the gun safe in the room they believed to be Adam Lanza's bedroom, court papers have revealed.

One person interviewed by the FBI described Lanza as "a shut-in and avid (computer) gamer who plays Call of Duty amongst other games."

FBI agents were also told the Sandy Hook Elementary School was his "life."

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Massacre gunman's arms haul

The gunman who killed 26 people, including 20 children, in a shooting spree in a US elementary school fired 155 bullets in less than five minutes. Court papers released reveal he also had several additional firearms not used in the attack.