Usahitman.com points out the lack of evidence Adam Lanza even alive for past three years. Lanza, a computer nerd, has left no trace of an online presence."Nobody 'falls off the grid' for 3 years.. it just doesn’t happen," observes website. It's also reported, Lanza destroyed his hard drive. "The FBI apparently can’t retrieve the information from his computer it was so well destroyed (how conven- ient)," comments website.