An arsenal of weapons including guns, more than a thousand rounds of ammunition, a bayonet and several swords was found in the home of the gunman who carried out the Newtown school shooting, according to search warrants released Thursday.
Adam Lanza killed 26 people inside Sandy Hook Elementary School and took his own life within five minutes of shooting his way into the building, State's Attorney Stephen J. Sedensky III said in a statement accompanying the release of the warrants in the Dec. 14 massacre.
The documents say that Lanza was found dead in the school wearing military-style clothing and a bulletproof vest, but the investigation later found that Lanza did not wear such a vest.
The inventory of the evidence seized from Lanza's home and the car he drove to carry out the massacre provided glimpses into the world of a troubled young man, but it does not answer the question of what could have motivated the attack. Investigators say it will take until June or later to complete the investigation.
Sedensky said 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.
Sedensky said 154 spent .223 casings were recovered at the scene. A loaded 12-gauge shotgun was found in 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. Another book found at the home with tabbed pages is titled: "Train Your Brain to Get Happy."
Writings and journals that belonged to Lanza were seized by police and turned over to the FBI for analysis. They also found three photos containing images of what appears to be a dead person covered with plastic and blood.
Police said they found a smashed computer hard drive, a gaming console and a gun safe in the house.
The warrants also revealed information obtained from interviews conducted by investigators.
On Dec. 14, the day of the shooting, interviews conducted by FBI agents found that an unnamed subject, presumably Lanza, "rarely leaves his home" and that the source considered "him to be a shut in and an avid gamer," listing "Call of Duty" among the games he played.
The FBI's source told agents that Sandy Hook Elementary "was Adam Lanza's 'life,'" according to the search warrants.
The source of the information was redacted from the search warrants released to media outlets, including CBS News.
Last month, CBS News senior correspondent John Miller reported that Lanza blacked-out the room where he played his tactical shooting games after a relationship between his divorced mother, Nancy Lanza, and her boyfriend grew serious enough that the boyfriend had spent the night at the Lanza home.
Lanza had also blacked-out his own bedroom to make it just as dark as where he played his games, Miller reported.
Investigators found a holiday card containing a check made out to Lanza for the purchase of a firearm, authored by his mother.
Sedensky said that before driving to the school to carry out the massacre Adam Lanza shot Nancy Lanza in her bed with a .22 caliber rifle.
"There was no indication of a struggle," Sedensky said.
Investigators found a rifle on the floor near the bed, according to one search warrant. She sustained an apparent gunshot wound to her forehead.
Last week, "CBS This Morning" co-host Norah O'Donnell asked parents Robbie and Alissa Parker, whose 6-year-old daughter Emilie died at Sandy Hook, whether they held Nancy Lanza responsible for the shooting.
"Does she have accountability? Oh, I think she has a lot of accountability," Alissa Parker told O'Donnell. "Do I think it was her fault? I'm sure that there were things that, you know, she's going to have to be accountable for, but, again, it's not my burden to carry."
Since the shooting, the Parkers met privately for more than an hour with Adam Lanza's father Peter Lanza, with whom they have found peace.
"I feel like he's made mistakes, and I don't feel like he gets the pass, but I don't feel like he should be responsible for what happened that day," Alissa Parker told O'Donnell. "That was not ultimately his decision to do that, so how could I hold him responsible for that? Were there missteps in the raising of his son? Possibly."
Documents indicate authorities found a brown gun safe with shotgun shells and numerous boxes of bullets, including 15 boxes that contained 50 bullets per box and additional boxes containing 10, 20 or 30 bullets in each.
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 paper targets and an NRA certificate that belonged to Adam Lanza.
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. The guns found at the home included a .323-caliber Enfield Albian bolt-action rifle, a .22-caliber Savage Mark II rifle, a BB gun and a .22-caliber Volcanic starter pistol.
Among the items seized was a news article on a 2008 school shooting at Northern Illinois University.
Previously, CBS News correspondent Bob Orr had reported that Lanza showed interest in other mass killings and authorities found literature on other massacres at his house, including a particular obsession with Anders Behring Breivik, a Norwegian man who killed 77 people in July 2011.
A judge's order to seal the warrants expired on Wednesday, and a Danbury Superior Court judge granted a request by Sedensky to withhold some details. Sedensky asked to redact the name of a witness, saying the person's safety might be jeopardized if the name were disclosed. He also asked that the release not include other information such as telephone numbers, serial numbers on items found and a few paragraphs of an affidavit.
Until now, prosecutors had made few details of the Newtown investigation available, despite pressure to do so from the governor, who criticized leaks to the press and lawmakers who clamored for more details as they craft legislation on mental health and gun control.
Gov. Dannel P. Malloy announced last week that additional information would be released at his request. He expressed concern that some information about the shooting rampage at Sandy Hook reportedly disclosed by a top state police commander at a recent law enforcement seminar in New Orleans was leaked.
In his statement, Sedensky said he ordered a stop to any presentations involving evidence in the case to prevent such disclosures. He said the investigation is ongoing.
"No conclusions have been reached and no final determinations have been made," Sedensky said.
Senate President Donald E. Williams Jr. said this week that legislative leaders are eager to review the search warrant documents before finishing work on a bipartisan bill that addresses gun control and other issues related to the massacre.