"That oddness doesn't explain mass murder," he said. "We can speculate. I think he was someone who felt extremely disempowered, very much a misfit in society and maybe that resulted in a great deal of rage toward society. ... This may have been his way of lashing out against the culture he felt was imposed upon him."
Richard Novia, the school district's head of security until 2008, who also served as adviser for the high school technology club, of which Lanza was a member, said he clearly "had some disabilities."