Iona Costello , 51 , and her daughter Emily , 14 , missing since late March . The bodies of the two girls were found in a shallow grave on their property near the town of Lake George, about 20 miles from New York City. Video shows them with suitcases , but relatives are worried after daughter began missing school . Mother told workers at her horse farm that she 'd be 'back on Tuesday '
Iona Costello , 51 , and her daughter Emily , 14 , missing since late March . Pair from posh suburb of Greenpoint , Long Island , often went to shows . Video shows them with suitcases , but relatives are worried after daughter began missing school . Mother told workers at her horse farm that she 'd be 'back on Tuesday '