An ID card belonging a Massachusetts teen last seen nearly four decades ago has been recovered from a river, along with unidentified human remains, authorities said. Judith Chartier, of Chelmsford, 17, was last seen on June 5, 1982, after leaving a party in Billerica. Middlesex District Attorney Marian Ryan said “significant portions” of the teen’s 1972 Dodge Dart Swinger were located by divers Tuesday in the Concord River in Billerica, marking a crucial development in the decades-old cold case. Investigators recovered human remains and a work ID of Chartier’s in the same river Wednesday near Tuesday’s find — about 50...