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

Sought by U.S. law enforcement for more than two decades, Zambada has been in U.S. custody since July 25, when he landed in a ...

Two warring factions of the Sinaloa cartel have clashed in the state capital of Culiacan in what appears to be a fight for ...

Mexican leader says the U.S. bore some responsibility "for having carried out that operation" to arrest Ismael 'El Mayo' Zambada.

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 ...

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, 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 ...

The Sinaloa Cartel under Zambada’s leadership began expanding its drug business into fentanyl manufacturing and distribution by 2012, making millions of dollars each year in corruption payments ...

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.