But Lanza sees his work as more than a challenge, or a call to arms.
The gun Lanza turned on himself was a Glock 10mm handgun, Mr Sedensky said.
All of the guns appear to have been bought by Lanza's mother, the state's attorney said.
One of the documents cites a gun safe that was found in Lanza's bedroom.
Police said they found a smashed computer hard drive and a gaming console in Lanza's bedroom.
Lanza would sit with his head straight down, his eyes adrift, never making eye contact.
When the haircut was done, the barber would tell Lanza it was time to get up.
The barber's sister would tell him there was something wrong with Lanza, that he wasn't right.
Twenty six people were killed by Adam Lanza in the mass shooting last week.
Adam Lanza's brother, Ryan, works as a certified public account in New York, the aunt said.
"She had issues with school, " said Marsha Lanza, who lives in Crystal Lake, Illinois.
But they say the pain has made it impossible to even drive past the Lanza home.
The guns used in the shooting had been legally bought by the gunman's mother, Nancy Lanza.
Lanza, his first victim, negligent in storing her weapons, as helpful neighbors now claim?
Having supervised the integration, Mr Lanza persuaded Lockheed to sell him ten electronics companies.
ECONOMIST: America's defence companies are turning dual-purpose
Ms. Lanza divorced her husband, Peter Lanza, in 2009 after a long separation, a relative said.
Earlier Friday, a law-enforcement official incorrectly identified the suspected shooter as Mr. Lanza's 24-year-old brother, Ryan.
That county includes the town of Kingston, where Adam Lanza's father, Peter, was raised.
Nancy Lanza checked off "yes" for financial disputes but "no" for parenting disputes, records show.
Lanza believes experiments already in progress or recently completed could validate his idea, but many scientists disagree.
There is no evidence that Mr. Lanza tried to buy guns and was denied, Mr. Sedensky said.
One of the questions asked repeatedly after the Newtown shooting is why Lanza did what he did.
She said Adam Lanza's mother "battled" with the school board and ended up having her son home-schooled.
Law enforcement officials have said Lanza showed an interest in other mass killings and played violent video games.
All said Lanza's theory needs to make clear predictions of experimental results, so that it can be tested.
Louise Tambascio said Nancy Lanza worked in charities for people with AIDS, and said she was extremely generous.
They found a military-style uniform in Lanza's bedroom and handwritten notes containing the addresses of local gun shops.
When Lanza began shooting, some of the students thought the noise was the clanging of pots and pans.
Like L-3's Frank Lanza, Newman has been doing some shopping of his own.
Future revenue potential will come from selling services that help business customers set up RFID systems, according to Lanza.
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