MEXICO CITY -- Mauricio Fernandez couldn't have been happier. Here he was, being sworn in again as mayor of one of northern Mexico's most exclusive communities, and he had wonderful news to share: "Black Saldana, who apparently is the one who was asking for my head, was found dead today in Mexico City," he told his cheering supporters Saturday in San Pedro Garza Garcia, near Monterrey. The problem was that the barefoot, blindfolded corpse of "Black Saldana" -- whose real first name is Hector -- wasn't found for another 3½ hours, according to Mexico City prosecutors. And he wouldn't be...