Adam Lanza was left alone for 3 days before Newtown massacre: reports

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Surviving family members of shooter's family shattered by tragedy

Adam Lanza was reportedly angry at his mother over video games.

Adam Lanza was left home alone for three days while his mother was on vacation in New Hampshire, authorities say.

Sources say Lanza was angry with his mother because she pressured him to be with friends instead of playing video games. They reportedly weren’t talking to each other.

The morning after she returned, Lanza shot her to death while she was sleeping and then went on to commit the unthinkable act of shooting all those children and teachers.