Girl declared brain-dead after eating hemlock Second Dallas teen who samples the plant makes full recovery 03/13/2002 By HOLLY WARREN / The Dallas Morning News A Dallas girl who ate hemlock has been declared brain-dead, hospital officials said Tuesday. Catherine Vanstone, 13, was among a group of Dallas-area girls spending spring break at Perennial Vacation Club just outside Bandera, about 40 miles west of San Antonio. She found the hemlock along a riverbed during a nature hike. Bandera County Sheriff James MacMillan said Catherine and another girl went for a walk Sunday afternoon along the Medina River. They found...