A son of notorious Mexican drug kingpin “El Chapo” pleaded guilty on Friday to US drug-trafficking charges, becoming the first of the drug lord’s sons to enter a plea deal. Prosecutors allege Ovidio Guzmán López and his brother, Joaquín Guzmán López, ran a faction of the Sinaloa cartel. Ovidio Guzmán López pleaded guilty to drug trafficking, money laundering and firearms charges tied to his leadership role in the cartel. Ovidio Guzmán López’s sentencing was postponed while he cooperates with US authorities, as he agreed to do on Friday. Their dramatic capture prompted a surge in violence in Mexico’s northern state of Sinaloa as two factions of the Sinaloa cartel clashed.