Frost recalled that Lanza once made a class presentation about how to change the folders in Microsoft Windows different colors. He did it without saying a word, just demonstrating the steps on a screen.
Lanza seemed to spend most of his time in his own large space in the basement of the home he shared with his mother - the same basement where she kept a collection of guns, said Russell Ford, a friend of Nancy Lanza's who had done chimney and pipe work on the house.
Just over a week ago, Lanza fatally shot his mother before blasting his way into the school, killing 20 children and six adults with a military-style rifle. As police approached, he used a handgun to commit suicide.
Nancy Lanza was often seen around town and regularly chatted up friends and acquaintances at a restaurant, but her 20-year-old son was a mysterious figure who was seldom spotted in this community of rolling hills and clapboard Colonial homes, according to Ford and other townspeople.
The basement of the Lanza home was fully carpeted and had artwork, including a picture of a horse, on the walls. There was a computer, a flat-screen television, couches, and an elaborate setup for video games. Nancy Lanza kept her guns in what appeared to be a secure case in another part of the basement, Ford said.
"She was from gun culture. Live free or die. That was truly her upbringing," said Ford, who often met the New Hampshire native and other friends at a regular Tuesday gathering at My Place, a local restaurant.
Ford did not know whether Lanza took her son shooting.
Over the last year and a half, Ford said, Nancy Lanza had told him that she planned to move out West and enroll Adam in a "school or a center." The plan started unfolding after Adam turned 18.
"He wouldn't be dwelling with her," said Ford, who remembered that Adam Lanza never spoke to him or even made eye contact.
"She knew she needed to be near him," he added. "She was trying to do what was positive for him."