AP:
Sedensky says Lanza killed all 26 victims inside Sandy Hook Elementary School with a Bushmaster .223-caliber rifle before taking his own life with a Glock 10 mm handgun. He says Lanza had another loaded handgun with him inside the school as well as three, 30-round magazines for the Bushmaster.
A loaded 12-gauge shotgun was found in the glove compartment of the Honda Civic Lanza drove to the school with two magazines containing 70 rounds of Winchester 12-gauge shotgun rounds.
At the house, investigators found books about autism and Asperger's syndrome as well as an NRA guide to pistol shooting.
Police said they found a smashed computer hard drive and a gaming console in Lanza's bedroom. An unnamed source told investigators that Lanza was an avid gamer who played "Call of Duty" and other games and rarely left his home.
Investigators found articles on other shootings and a holiday card containing a check made out to Adam Lanza for the purchase of a firearm, authored by his mother, Nancy Lanza.
Documents indicate that authorities found a gun safe with shotgun shells and numerous boxes of bullets. In a bedroom closet, they found ear plugs, a handwritten note regarding ammunition and magazines, paperwork on guns and a metal bayonet.
In a top drawer of a filing cabinet, they found paper targets. In a duffel bag, they found ear and eye protection, binoculars, numerous other paper targets and Lanza's NRA certificate.
Authorities found numerous knives, including samurai swords. They found a military-style uniform in Lanza's bedroom and handwritten notes containing the addresses of local gun shops.