A 4-year-old boy who was found dead in Lorton, Virginia, more than 50 years ago, and whose name has remained a mystery, has finally been identified after a flood of tips, a series of DNA tests and decades of twists and turns. Fairfax County police Chief Kevin Davis announced the breakthrough Monday, saying the child’s identification has led police to two people who are believed to have been involved in his killing, and another missing boy whose body has never been discovered. The case of the boy, identified as 4-year-old Carl Matthew Bryant, confounded police and the public for decades....