New footage shows a missing teenager — who disappeared more than two weeks ago — was last seen on a bridge over a river. Police have released the clip they believe captures Thomas Medlin, 15, on the pedestrian walkway on Friday January 9 at 7.06pm. The investigation into Thomas' disappearance has involved "extensive video canvassing and review of digital evidence," police in New York City said today. Thomas is said to have left home on Long Island, New York, to meet someone he had been chatting