updated 12/17/2012 AT 4:00 PM ET
•originally published 12/18/2012 AT 11:30 AM ET
As divorces go, the one between Peter and Nancy Lanza appeared to be as amicable as possible under the circumstances, with agreement on generous alimony and custody.
But when the Lanzas finalized their split in 2009, they did have concerns about the care of their then-17-year-old son Adam, according to the pair’s divorce mediator.
“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,” their divorce mediator, Paula Levy, tells the Associated Press.
According to Levy, the Lanzas said their son had been diagnosed with Asperger syndrome, an autism spectrum disorder.
“They worked together about it,” Levy adds. “The mom, Nancy, pretty much said she was going to take care of him and be there as much as he needed her, even long-term.”