A San Antonio teenager remained missing Friday, five days after a minor traffic accident in Piedras Negras, Mexico, turned into a violent confrontation with armed men who reportedly beat him with baseball bats and dumped him miles away. "We're scared because we don't know if he is dead or alive," said Iris Anzures, 25, whose younger brother Jerry Contreras was last seen Sunday afternoon. Contreras and his girlfriend Valerie Cardenas, both 17, had traveled across the border with their infant son, Jason, to attend a baby shower for Anzures. The accident occurred a few blocks from the hall where the...