“This appears to be a case of mistaken identity,” said Barrios, the Tamaulipas prosecutor. Matamoros is home to warring factions of the Gulf drug cartel. Shootouts there on Friday were so bad ...

Images: AFP/Getty Images/Zuma Press Composite: Mark Kelly The brutal kidnapping of four Americans in the Mexican border city of Matamoros ... between a cartel and the Tamaulipas State Guard.