One of the world’s most powerful criminal syndicates is facing a government crackdown and internal war after the son of a drug lord betrayed his partner.

Cartel boss pleads guilty The son of Sinaloa Cartel boss “El Chapo” Guzman has pleaded guilty to federal drug charges in Chicago. Federal prosecutors announced Ovidio Guzman Lopez, who succeeded his father as one of the leaders of the cartel in Mexico,

Inside a sports arena in Sinaloa state’s capital, the crowd was sparse early on the card as young amateur boxers in puffy headgear threw punches and danced about the ring. Outside stood a bronze statue of Julio César Chávez in boxing trunks,

Mexican authorities in Sinaloa state said 20 people were killed, including some who were decapitated, in the latest episode of cartel-driven violence.

Boxing legend Julio César Chávez defended his son, Julio César Chávez Jr., amid his arrest by U.S. immigration officials and an active warrant for his arrest in Mexico, claiming his son is innocent of the criminal acts he is accused of.

Four decapitated bodies have been found hanging from a bridge in Mexico's Sinaloa state, part of a surge of violence that claimed the lives of 20 people in less than a day.

Margarito "Jay" Flores Jr. tells the Sun-Times he and his brother Pedro Flores — who helped bring down Sinaloa cartel cocaine king "El Chapo" — back Saul Rodriguez's bid to be released early from prison even though Rodriguez abducted his brother in 2003.

Mexico's Attorney General's Office claims former world champion boxer Julio Cesar Chavez Jr. was a "henchman" of the Sinaloa Cartel.