Los Zetas gun haul. The Los Zetas are a drug cartel in Mexico that were trained by some of the best combat specialists in the US. They were originally intended to help fight against the Mexican drug cartel's but many men from the Mexican army split off in 2005 and formed the most powerful cartel to date.
Los Zetas The Zetas are thought to have become the largest cartel in Mexico recently, operating in over half the country's states. Leader: The notoriously brutal gangster Miguel Angel Trevino Morales (alias "Z-40") is believed to be the new leader of the Zetas drug cartel following a showdown with Heriberto "El Lazca" Lazcano. Trevino is infamous for human "cookouts" in which he stuffs people in oil drums and lights them on fire.