el Hummer is one of the founding members of The Zetas. The Zetas were originally members of the Mexican Army’s elite Airborne Special Forces Group (GAFE), trained in locating and apprehending drug cartel members. It is believed that they were originally trained at the military School of the Americas in the United States.

After the military killed Guzmán Decenas on November 2002 and captured his second-in-command, Rogelio González Pizaña, on October 2004, ex-GAFE Heriberto "The Executioner" Lazcano ascended to the leadership of the paramilitaries. During this time 'el Hummer' was given power over nine Mexican states.
Source(s):
http://warintel11.wetpaint.com/page/New+Mexican+cartel+boss+Juan+Jose+Espar...
http://www.stratfor.com/theme/tracking_mexicos_drug_cartels/?utm_source=TWe...
http://www.nowpublic.com/world/presumed-killer-mexican-singer-valentin-eliz...
http://en.wikipedia.org/wiki/Los_Zetas
http://en.wikipedia.org/wiki/School_of_the_americas

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