A Texas couple left the hospital convinced they’d been given the wrong baby—and as it turns out, they were right. Mercedes Casanellas and her husband, Richard Cushworth, are both missionaries from Texas who were working in Latin America. In May, while the couple was in El Salvador, Casanellas says she gave birth to a baby boy at a private hospital. Before the couple returned to their Dallas, Texas home, Casanellas says she felt something wasn’t right. She says the baby she was handed at the hospital looked different from the one she held in the delivery room. Finally, after three...