Mario Cárdenas Guillén is the brother of the Mexican drug lord who was the former leader of what group?
Osiel Cárdenas Guillén Osiel Cárdenas Guillén (born May 18, 1967) is a former Mexican drug lord and the former leader of the Gulf Cartel (Spanish: "Cártel del Golfo" ) and Los Zetas. Originally a mechanic in Matamoros, Tamaulipas, where he was born, he entered the Gulf Cartel by helping Juan García Abrego, the capo at the time; when García Ábrego was arrested in 1996, some infighting erupted within the cartel. Osiel Cárdenas eventually took control by killing his friend and contender Salvador Gómez, earning Cárdenas the nickname ""El Mata Amigos"" (The Friend-Killer).
Operation Quintana Roo Operation Quintana Roo (Spanish:"Operacion Quintana Roo") is an anti-drug trafficking military operation jointly conducted by the Mexican army and navy in the Mexican state of Quintana Roo. The operation began in early February 2009 after the death of former Brigadier General Mauro Enrique Tello Quiñónez and two other men.