Sons of former Mexican drug lord Joaquin "El Chapo" Guzman denied U.S. allegations that they were major traffickers flooding the United States with synthetic opioid fentanyl, addressing the claims against them in a rare letter.
The U.S. Justice Department last month charged leaders of the Sinaloa Cartel with trafficking fentanyl and other drugs, including four sons of El Chapo, the cartel's one time leader who is now imprisoned in the U.S.
