David Hernandez of New Britain is charged with custodial interference and unlawful transaction with a minor in the case. Police say he and his son picked up the girl on Jan. 2 from her home in Pineville and drove her to Connecticut.
WYMT-TV reports Hernandez entered the plea Friday in Bell County District Court after being extradited to Kentucky on Thursday.
He told the station he thought the girl was 18 and believed he was rescuing her from an abusive situation. He said his son had an online relationship with the girl.