When Lanza's parents divorced in 2009, the settlement left his mother with a comfortable income and the knowledge that the then-17-year-old boy's education would be paid for and his medical insurance covered.
If there was bitterness and anger between Nancy and Peter Lanza, it is not described in court papers. And there was no mention of any lingering mental health or medical issues for Adam Lanza, nothing that could even hint at the horror he would unleash three years later.
In working through the terms of their divorce, the couple spent considerable time talking about how to provide for Adam Lanza's well-being, said Paula Levy, a mediator who worked with the couple.
During their meetings, the couple mentioned that Adam Lanza had been diagnosed with Asperger's syndrome, an autism spectrum disorder, Levy said. But the Lanzas were in complete agreement on how to address Adam's needs and said little about the details of his condition, Levy said.
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"The only two things I remember them saying is that she really didn't like to leave him alone, and I know they went out of their way to accommodate him," said Levy, who recalled Nancy and Peter Lanza as very respectful of each other and equally concerned about their son's needs.
"They worked together about it," Levy said. "The mom, Nancy, pretty much said she was going to take care of him [Adam] and be there as much as he needed her, even long-term."
While she would not disclose details of their discussions, Levy wanted to make clear that the Lanzas were loving parents who wanted the best for their son.
"These people are soft-spoken, gentle, both of them saying, 'What can we do to help him?' " Levy said.
The lawyer who represented Nancy Lanza in the divorce also spoke positively of her, calling her courteous and polite. "She was an intelligent woman who we were pleased to represent," said the firm of Piazza, Simmons & Grant in Stamford.
The Lanzas married in June 1981 in Kingston, N.H. Nancy Lanza filed for divorce in 2009, by then living with her son in the home where she was found dead in her pajamas on her bed.
Nancy Lanza received $289,800 in alimony this year. It was to continue until December 2023, with slight increases each year for cost of living.