Mario Cárdenas Guillén is the brother of the Mexican drug lord who was the former leader of what group?
Mario Cárdenas Guillén Mario Alberto Cárdenas Guillén is a former leader of the Mexican criminal group called the Gulf Cartel. He is the brother of Osiel Cárdenas Guillén and Antonio Cárdenas Guillén.
La Oficina de Envigado La Oficina de Envigado (English: The Office of Envigado ) is a drug cartel and criminal organization founded as an enforcement and collections arm of Pablo Escobar's Medellin Cartel. It operates throughout Colombia, but mainly in the cities of Medellín and Envigado. It also controls extortion, gambling, and money laundering businesses within the Valle de Aburra that surrounds Medellin. It positioned itself as the chief mediator and debt collector in drug trafficking disputes and maintained major connections with the "paracos" (Colombian paramilitaries) and guerillas.