Mexican cartel boss Ismael “El Mayo” Zambada, who was one of the United States’s most wanted drug lords, pleaded not guilty ...

Longtime drug cartel leader Ismael “El Mayo” Zambada has pleaded not guilty to U.S. narcotics trafficking charges.

Ismael "El Mayo" Zambada, a powerful longtime leader of Mexico's Sinaloa drug cartel, pleaded not guilty Friday to U.S. narcotics trafficking and murder charges.Participating in a court hearing ...