Sandy Hook Shooter's Father Describes How Son 'Changed'

Adam Lanza's father opens up about his son, the victims and their families.
3:00 | 03/11/14

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Transcript for Sandy Hook Shooter's Father Describes How Son 'Changed'
And today, answers to a question asked by everyone in this country, after the shooting at the elementary school in Newtown, Connecticut. Why? And what was in the mind of the shooter? For the first time, his father reveals details about the son he says changed. Here's ABC's national correspondent, Jim Avila. Reporter: Those killer eyes. And today, new insight into the mind behind them. Speaking for the first time to "The new Yorker" magazine, Adam Lanza's father, peter, says he wishes his son was never born. You can't get anymore evil. Adam's dad describing him as a little weird kid who didn't speak until he was 3. So sensitive to touch, the tags in his shirt had to be removed. Diagnosed with the asperger form of autism at 13. But peter Lanza says autism was not responsible for the shooting the most comprehensive study of mass murderers found only one other killer suffered from autism. He worsened at a teen. Social awkwardness, the uncomfortable anxiety, unable to sleep, stress, unable to concentrate, having a hard time learning. The awkward walk, reduced eye contact. Today, the father finally warning other parents, this could happen to them. Jim Avila, ABC news, Washington.

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