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

Ismael "El Mayo" Zambada, longtime leader of Mexico’s Sinaloa drug cartel, pleaded not guilty to U.S. narcotics trafficking ...

Two warring factions of the Sinaloa cartel appear to be fighting for power since two of its leaders were arrested in the U.S.

The recent surge in cartel warfare had been expected after Joaquín Guzmán López, a son of former Sinaloa cartel leader ...

Officials attribute the violence to internal conflict within the Sinaloa cartel following the arrest of Zambada, the cartel’s co-founder. He was extradited to the U.S. in July and pleaded not ...

Ismael "El Mayo" Zambada, a powerful leader of Mexico's Sinaloa cartel, pleaded not guilty Friday in a U.S. drug trafficking case that accuses him of engaging in murder plots and ordering torture.

Ismael “El Mayo” Zambada, the powerful longtime leader of Mexico’s Sinaloa drug cartel, pleaded not guilty Friday in New York on a 17-count indictment accusing him of narcotics trafficking ...

Ismael "El Mayo" Zambada, longtime leader of Mexico’s Sinaloa drug cartel, pleaded not guilty to U.S. narcotics trafficking and murder charges on Friday. Zambada said in a letter that he was ...

NEW YORK — Ismael “El Mayo” Zambada, a powerful leader of Mexico’s Sinaloa cartel, pleaded not guilty Friday in a U.S. drug trafficking case that accuses him of engaging in murder plots ...

By Alan Feuer The decision by the Justice Department will put Ismael Zambada García in the same federal courthouse where his fellow Sinaloa cartel founder, El Chapo, was sentenced to life in prison.