Plenty of fingers have been and will continue to be pointed in the aftermath of the Connecticut school shooting, but could Adam Lanza's parents have ever seen this coming?
Their 2008 divorce papers reveal nothing that would indicate their son had serious mental issues, however, there may have been some warning signs.
A mediator who worked with the couple recalled his mother saying she didn't like to leave him alone and that his parents went out of their way to accommodate him.
Marriage therapist Paula Levy said that during about 10 two-hour sessions, Nancy and Peter Lanza were respectful of each other and concerned about their son.
She says the couple told her that Adam Lanza, then 16-17 years old, had been diagnosed with Asperger's syndrome, an autism-like disorder.
They spent considerable time talking about how to provide for his well-being.
Peter and Nancy Lanza split up for good the following year, and were financially well off; In 2012 Nancy was to receive $289,800 in spousal support.
Levy says the Lanzas agreed how to divide caretaking responsibilities and as a result said little about Adam; there was no mention of serious mental issues.
Certainly nothing that could even hint at the Newtown, Conn., massacre.
Adam Lanza shot his mother in the head with a rifle Friday, at the home where they lived, then headed to Sandy Hook Elementary School armed with her three guns.
With a high-power rifle, two handguns and enough ammunition to kill nearly every child in the building, he killed 20 students, six adults and himself.
Authorities have pored over computer, cellphone and credit card records trying to piece together the Lanza family's days leading up to the shooting.
Adam and Nancy are survived by his brother Ryan and Peter Lanza, who, in a statement this weekend, said that like everyone else, is floored.
"We too are asking why," he said.
"We have cooperated fully with law enforcement and will continue to do so. Like so many of you, we are saddened, but struggling to make sense of what has transpired."