AOL.com Video - Analyzing Lanza's DNA: What Made Newtown Shooter Snap?

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Analyzing Lanza's DNA: What Made Newtown Shooter Snap?

Description:Geneticists have joined the investigation into the Sandy Hook Elementary School massacre. The state medical examiner was asked to do a complete analysis of shooter Adam Lanza’s DNA, but they aren’t looking for anything specific. Geneticists say there are genetic components to mental illness, but there are many genes involved — not just a single gene or mutation. (0:23)

Source: PIX11

Tags: adam lanza , newtown school massacre , newtown shooting , pix11