whom had trained at the US-led School of the Americas—but the group expanded and evolved, becoming increasingly, violently autonomous. By 2001, the group had already added to its brutal money-making repertoire the mass kidnappings of undocumented migrants for ransom money. By 2007 it had broken away to form an independent cartel. In 2009 the Drug Enforcement Administration (DEA) called the Zetas, simply, “Mexico’s most organized and dangerous group of assassins.”
