Sandy was a result of video game orgy porn like gallore that the nutjob kid wanted to “try it” in the real, imo. He was a liberal at that, a sore loser, that is. He was jealous of the children his mother taught. He was a typical ceature of the left, floated out there, but not directly motivated, even by a psychologist.
There is a certain amount of cover up in the story.
Nancy Lanza wasn’t a teacher at the school.