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‘No conclusive motive’ in Newtown shootings, report says

Adam Lanza had "significant mental health issues," says a new report, which also states that he acted alone. No explanation would make the shooting explicable.

Police outside the home of Nancy Lanza, Dec. 18, 2012.
Police outside the home of Nancy Lanza, Dec. 18, 2012.AFP/Getty Images

Michele Richinick