Back on topic I just saw a news report (on Neil Cavuto) that a neighbor of the Lanza's disclosed that the mother had said it was becoming too difficult for her to deal with her autistic son's rages and tantrums, and she was about to have him committed. Which he had just become aware of, and angered him greatly.
Adam Lanza was also very jealous of his mother's time spent as a substitute teacher caring of children at the school. So the slaughter was apparently in his mind slaughter and payback for her time he percieved the school and children to take away from him.
I don't know if they found this only from interviewing friends and neighbors, or possibly getting information from the family computer, or staff at the institution who disclosed or verified this.
