Sergio Enrique Villarreal Barragán, a.k.a. El Grande, (b. September 21, 1969), is a former Mexican federal police officer who then worked as a lieutenant for Arturo Beltrán Leyva of the criminal organization called the Beltrán Leyva Cartel.
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Allegedly, he was hired by the Beltrán Leyva Cartel and by 2007 he rose to the rank of lieutenant for Arturo Beltrán Leyva.
Sergio Leone | Villarreal CF | Sergio Franchi | Sergio Ramos | Sérgio Mendes | Sergio Martino | Villarreal | Sergio Osmeña | Sergio Fabbrini | Sergio Aleati | Alicia Villarreal | Sergio Sollima | Sérgio Godinho | Sergio Corbucci | Sergio Santos | Sergio Pérez | Sergio Marchionne | Sergio Fiorentino | Sergio Badilla Castillo | Sergio Vargas | Sergio Tofano | Sergio Oliva | Sergio Mulko | Sergio Mora | Sergio Marchi | Sergio George | Sergio García | Sergio Donati | Sergio Dalma | Sergio Cragnotti |
According to Mexican media reports, shortly after the death of the cartel's leader, Arturo Beltrán Leyva on December 16, 2009, Valdez began to dispute the cartel's leadership and its territory; one faction was led by Valdez and Gerardo Alvarez-Vazquez, while the other is led by Arturo's brother Héctor Beltrán Leyva and his lieutenant Sergio Villarreal Barragán.