Ismael Mario Zambada García, the former drug lord and top leader of the Sinaloa cartel known as El Mayo, will plead guilty to federal drug charges.

The expected plea comes after the Justice Department said it would not seek the death penalty for Ismael "El Mayo" Zambada.

Ismael El Mayo Zambada, the accused co-founder of Mexico's Sinaloa cartel, is expected to plead guilty to U.S. drug ...