SAN LUIS, DOMINICAN REPUBLIC -- Two pillar candles sit on the front porch of a modest home, adorning a framed photograph of a teenager named Ismael Ureña Pérez. Beside it are two of Ismael's wooden bats and a used pair of his red cleats, the only article of clothing his mother kept. She emptied his drawers and threw out the rest. "It was just too hard to look at every day," Iris Pérez said through...