NEWTOWN, Conn. -- Like a lot of people who interacted with Lanza, Dot Stansy said he was "just quiet"
"On one side, he did something unspeakable, but on the other, that's not how I remember him," Stansy said. "I remember him as the nice kid that, you know, I sat near to in class. We'd joked, he'd laugh, that kind of thing."
"We were all hanging out outside of class afterwards one night, and he walked by and we were like, 'Hey, do you want to grab a drink with us?' And he said, 'No, I can't, I'm 17.'"
Lanza was also being home-schooled at the time.
He took seven college-level courses between the summers of 2008 and 2009, receiving several As in computer classes and also one in American history. His overall GPA was 3.26.
Dot Stasny remembers meeting Adam Lanza's mother.
"[She] introduced herself, said he was sick, asked where the classroom was, and when we walked in, she was getting his assignments from the teacher," Stansy said.
Nancy Lanza's friends,that she told them Adam had Asperger's syndrome and taking care of him was a full-time job.
"I mean, I know he was on he was on medication and everything, but she home-schooled him at home cause he couldn't deal with the school classes sometimes," Louise said. "So she just home-schooled Adam at home. And that that was her life."
Ryan Kraft,when Adam was just about 10 years old, got a glimpse of how difficult he could be.
"I received instructions from Nancy to always supervise Adam at all times and to never turn my back on him," Kraft said.
Adam Lanza's parent divorced in 2009. CBS News spoke to a mediator in that divorce, who said his parents seemed to love him and only wanted the best for him.