The post about the school not being able (or want to) keep him might be another reason. (”Well if I can’t go there - nobody can.) Or he was just looking to be “famous” (as I posted earlier) by a huge number of deaths (unprotected area) and in the most gruesome fashion (little kids).
There was a “Criminal Minds” repeat I saw awhile ago where it reminded me of this guy. The guy could not feel physical pain (like Lanza), had an extensive gaming persona, loner, outcast, etc. The not feeling pain is a weird one though - I forget on the TV show what they said it was - mental trauma or some other mental issue. (Whether it is true in real life I have no idea!)
Conspiracy theories aside - what is sad is that little Emilie Parker is dead. Along with most of her classmates. And Obama is dancing on their graves.