Dangerous Mexican/U.S. Criminal Enterprises Operating Along the (tags)
Many were beheaded with or without written messages on bodies or in vehicles. The cartels’ methods of torture and killing are particularly brutal. On September 6, 2006, masked gunmen entered a nightclub in the Michoacan, fired guns in the air and rolled five severed human heads onto the dance floor
They're known as "Los Zetas (tags)
The men are known as the Zetas, former members of the Mexican army who defected to Mexico's so-called Gulf drug cartel in the late 1990s