'Connecticut school shooter Adam Lanza and his mother visited gun ranges'
She said Lanza's mother "battled" with the school board and ended up having her son home-schooled.
"She had issues with school," said the aunt, who lives in Crystal Lake, Illinois. "I'm not 100 per cent certain if it was behaviour or learning disabilities, but he was a very,
very bright boy. He was smart."
"You could definitely tell he was a genius," Alex Israel, a classmate of Lanza at Newtown High School who lived a few houses down from him, was quoted by the channel as saying.
"He was really quiet, he kept to himself," Israel added.
A relative told investigators that Adam Lanza had a form of autism, according to a law enforcement official, who spoke under condition of anonymity due to the sensitive nature of the investigation.
But a national autism committee cautioned against speculating about a link between autism and violence.