Los Zetas

Los Zetas (Zetas, Zs) is a powerful and violent criminal syndicate in Mexico, and is considered by the U.S. government to be the "most technologically advanced, sophisticated, and dangerous cartel operating in Mexico. The origins of Los Zetas date back to 1999, when commandos of the Mexican Army's elite forces deserted their ranks and decided to work as the armed wing of the Gulf Cartel, a powerful drug trafficking organization. In February 2010, Los Zetas broke away from their former employer and formed their own criminal organization.