Mom Planned to Have Lanza Committed: Source

Investigators have yet to offer a motive for Adam Lanza's deadly rampage, but a Newtown resident offers one theory to Fox News: Lanza lost it because his mother planned to commit him against his will. Joshua Flashman, the son of a Newtown pastor, says he has been told that Nancy Lanza was petitioning the court to get conservatorship over her son so she could then send him to a mental institution, and Adam was "really, really angry" about it. "I think this could have been it, what set him off.” Another resident tells Fox a similar story; police say only that Nancy's plans for "his future mental health treatment" are being reviewed in the search for a motive. Other recent revelations:

• Though most reports say she had no ties to Sandy Hook Elementary, Flashman says Nancy Lanza volunteered with kindergartners there last year. Adam may have believed that "his mom loved him less than she loved the kids, loved the school," he says.
• The shooter cut off all ties with his father, Peter Lanza, in 2010, following his parents' 2009 divorce, a source tells NBC News. The couple separated—apparently amicably—in 2001, and Adam saw his father every week in the ensuing years. The source says Peter hadn't seen or heard from his son since 2010.
• A close friend of Nancy's told PIX 11 that Adam was a vegan ... because he "didn’t want to hurt animals."

Click for more details about Adam Lanza. (More Nancy Lanza stories.)