He was 26, living in his mother's house, making little money, spending his time on the internet and gaming, deeply lonely and longing for a relationship with a woman, and never had sex. Loner. Alienated. It is easy to see how such a person could become deeply depressed. It is still unknown if he was on meds, but given his profile and the name "Lithium_Love", I'd be surprised if he wasn't.

"The gunman who authorities say mercilessly opened fire inside a classroom at a small Oregon college Thursday shared a documentary about the 2012 Sandy Hook shooting tragedy on a Web forum just days ago and appeared to be a loner

Oregon community college gunman sympathized with Virginia TV shooter, shared Newtown school shooting documentary

"Yet when they spill a little blood, the whole world knows who they are," the gunman recently blogged.

On the same website, Chris Harper-Mercer, using the handle "Lithium_Love," also expressed sympathy for Vester Flanagan, the disgruntled former television reporter who shot and killed two Virginia journalists on live TV in August.

"People like him have nothing left to live for, and the only thing left to do is lash out at a society that has abandoned them," Harper-Mercer wrote in a blog post on Aug. 31. "His family described him as alone, no partner/lover.