The maniac who slaughtered 20 first-graders at Sandy Hook Elementary School had an interest in pedophilia and may have believed he was “saving” the children he murdered, according to documents released on Tuesday.

Adam Lanza was oddly interested in children in addition to other mass killings of students such as in Columbine — but there was no evidence he ever sexually abused a child, according to the more than 1,500 of FBI records into the investigation.

Lanza perpetrated one of the worst mass shootings in American history with his 2011 bloodbath in Newtown, Conn.

In the newly released FBI records, State investigators said they had found a file on Lanza’s computer that they described as “advocating pedophiles’ rights and the liberation of children.”

They also said they found a screenplay describing a relationship between a 10-year-old boy and a 30-year-old man.

Another document cited an unidentified woman who told the FBI that Lanza said adult-child sexual relationships could be “possibly beneficial to both parties.”

The woman also told the FBI that Lanza believed that mass murders were a symptom of a broken society and he may have believed he was “saving” children from the “harmful influences” of adults during the school shooting.

Adam Lanza shot his mother to death in their home before going to the school and murdering more on Dec. 14, 2012.