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Adam Lanza was the perpetrator of the Sandy Hook Massacre on December 14, 2012. He killed 27 people (including his own mother) before shooting himself.
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![The 2012 Sandy Hook Massacre & What Led Up To It [Adam Lanza] poster](/_next/image?url=https%3A%2F%2Fimage.tmdb.org%2Ft%2Fp%2Fw500%2F2IE4QV6N8VSbFKkIHau5Bbs1oAU.jpg&w=1920&q=75)