• Prosecutors release new documents related to December's shootings at school in Newtown, Connecticut
• Documents: Investigators found a gun safe in shooter Adam Lanza's room
• Documents: 1,600 rounds of ammunition found in Lanza's home
• Police say Adam Lanza, 20, killed his mother, then 20 children and six staff members at Sandy Hook Elementary School in Connecticut before killing himself
• People who knew Lanza described him as quiet, smart, socially awkward. Connecticut's medical examiner has said he was told that Lanza had Asperger's syndrome.
• Live updates below. Also, read the full story; and see the documents

[Updated at 1:51 p.m. ET] This live blog is wrapping up, but please check out our full story for the latest about today's document release.

[Updated at 1:48 p.m. ET] One of the warrants released Thursday cites an interview with a person who said that Lanza rarely left his home, that he was a shut-in, "and an avid gamer who plays Call of Duty, amongst other games." "Call of Duty" is a military-style war game.

In the house, according to the documents, were several books - one titled "NRA guide to the basics of pistol shooting," another about Asperger syndrome and one on autism. Both are developmental disorders that are not typically associated with violence.

Police also found a 2008 New York Times article about a shooting at Northern Illinois University. Police took from the house an NRA certificate for Nancy Lanza, a receipt for a shooting range in Oklahoma, a book titled "Train your brain to get happy," and three photographs "of what appears to be a deceased human covered with plastic and what appears to be blood."

As noted below, the NRA issued a statement today saying neither Lanza nor his mother were members.

[Updated at 1:45 p.m. ET] The main details of the shooting have long been known: The carnage began on the morning of December 14, when Lanza fatally shot his 52-year-old mother, Nancy Lanza, with a .22 caliber rifle.

But some of the details are new. "There was no indication of a struggle," according to a statement from Stephen J. Sedensky III, state's attorney for the judicial district of Danbury. The statement came with Thursday's release of five search warrants and related documents.

Lanza shot his mother in the forehead, one of the search warrants says.

Laden with weapons and ammunition, Lanza then went to the elementary school, shooting his way into the building where he killed the 26 victims with a Bushmaster .223 caliber model XM15 rifle, according to Sedensky.

The rampage ended when Lanza, using a Glock 10 mm handgun, shot himself.

Attached to the rifle police found a 30-round capacity magazine that still had 14 bullets Sedensky said, and a search of Lanza's body found that he was carrying more ammunition for the handguns as well as three more 30-round magazines for the Bushmaster, each fully loaded.

"Located in the area of the shootings were six additional 30-round magazines," Sedensky said in his statement, three of them empty and the others holding 10, 11, and 13 rounds. Police found 154 spent .223 caliber casings at the school.

All of the guns appear to have been bought by Lanza's mother, the state's attorney said.

[Updated at 12:59 p.m. ET] We've gotten all the documents together in one place. Here are the documents that Connecticut prosecutors released today in the Newtown investigation.

[Updated at 12:35 p.m. ET] Back to today's Newtown document release. The National Rifle Association has issued a statement, apparently reacting to what the papers say about investigators finding NRA certificates for Lanza and his mother, Nancy.

"There is no record of a member relationship between Newtown killer Adam Lanza, nor between Nancy Lanza, A. Lanza or N. Lanza with the National Rifle Association," the NRA statement said. "Reporting to the contrary is reckless, false and defamatory."

This page from one of the search warrants released in the Newtown case Thursday mentions investigators found an "Adam Lanza National Rifle Association certificate."

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