Inside the Family of Sandy Hook Elementary School Shooter

New details emerge this morning about Adam Lanza's mother and family members.
2:02 | 12/15/12

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Transcript for Inside the Family of Sandy Hook Elementary School Shooter
Reporter: Good morning, george. We're standing in front of, next to the home, where apparently this killing spree began. A troubled son, killing his mother. A woman that relatives say, was a mom who would have done anything to help her son if she knew he needed help. As newtown, connecticut, is still trying to make sense of this inexplicable shooting, new details are emerging on the lanza family. I remember them to be shy, quiet, well-behaved kids. Reporter:24-year-old ryan lanza, brother of adam, was taken into custody and questioned by authorities. But police say he is not suspected of being involved in the shooting. Ryan worked at ernst & young in manhattan. Investigators are looking at whether the 20-year-old shooter was carrying ryan's i.D. At the cause of the shooting, causing the initial misidentification. Authorities told abc news, their mother, nancy lanza, was found fatally shot at their connecticut home. She raised very nice boys to me. That's why I think it's a shock to even know them and realize who they are. And wha did. Reporter: State records indicate she was divorced from her husband in 2009. Nancy and her ex-husband, peter lanza, were required to complete a parenting education program, necessary for divorced couples with children under 18. They say fact that t parents were divorced must have contributed to it. Reporter: The shooter's father, peter lanza, was a vice president at g.E. Capital, and had been a partner at ernst & young. He is remarried and was questioned by authorities. But is not under any suspicious. The mother who lived here on this street, was -- had some connection to the school, we're told. But the superintendent said this morning that she was not officially employed there. She may have volunteered in some way. As for the father, they're divorced. He doesn't live here. He lives in stanford. And he apparently found out about the killing from a reporter who was in his driveway when he came home and informed

This transcript has been automatically generated and may not be 100% accurate.

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