BROWNSVILLE — Rafael “El Junior” Cardenas Vela, nephew of imprisoned Gulf Cartel kingpin Osiel Cardenas Guillen and alleged plaza boss for the cartel's Matamoros, Mexico, headquarters, has ...

3 sons of "El Chapo" among dozens charged in U.S. fentanyl investigation 00:52. Feuding Mexican cartels briefly blocked roads Tuesday in the border city of Matamoros, across from Brownsville, Texas.