Officials: Lanza Had Researched Other Mass Killings

NEW HAVEN, Conn. — People close to the investigation tell The Associated Press that the gunman in the Connecticut school massacre showed interest in other mass killings.

Twenty-year-old Adam Lanza killed his mother at their home before killing 20 first-graders and six staff members at Sandy Hook Elementary School in Newtown on Dec. 14. He killed himself as police arrived.

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