Law enforcement officials say they believe Connecticut school shooter Adam Lanza was obsessed with mass murders, going so far as to post about it on gun message boards and chat rooms. Lanza reportedly didn’t use his name, but investigators believe he discussed his favorite bullet and showed off his technical mastery of guns. The poster, suspected to be Lanza at one point, asked questions about Connecticut’s assault-gun ban and made several corrections to Wikipedia pages about mass killings.
