Cartel roadblocks paralyzed Matamoros and Río Bravo after the arrest of the Gulf Cartel's leaders's son, Axel Alfredo Cárdenas Rodríguez. Security Minister Omar García Harfuch confirmed Thursday afternoon that Axel Alfredo Cárdenas Rodríguez, son of a Gulf Cartel leader known as “El Contador” (The Accountant), had been detained earlier in the day.