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Adam Lanza

Adam Lanza in 2008, when he was in the 10th grade at Newton High School. One of Adam's teachers said he had "episodes" when he became completely silent and withdrawn, but appeared to be making progress socially in school. (Frontline)

Never before seen pictures of Adam Lanza

Months after the elementary school shooting left dozens dead, little is known about the quiet shooter who killed his mother before driving to the school.