The gunman, identified as Adam Lanza, 20, was also found dead at Sandy Hook Elementary School in Newtown, a federal law enforcement official said. Lanza's mother is a kindergarten teacher at the hilltop school, and it's inside her classroom where most of the casualties were found, according to NBCNewYork.com.
Law enforcement officials initially told NBC News the gunman was Lanza's brother, Ryan. Another relative, who was not identified, was found shot to death at a home in Newtown, officials said.
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