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Gangsters have been a thorn in America's side for much of the country's history, but their undoing often comes as quickly as the rise to power as the government catches up to the criminals. This series follows the rise and fall of some of the nation's most notorious crime bosses, though not necessarily ones that are household names. The profiles of thugs, outlaws and kingpins reveal their motives, transgressions and what eventually led to their captures. The corrupt folks whose stories are told include Alberto "Alpo" Martinez, who ran a drug ring that spread through much of the Northeast, and Ruben "Doc" Cavazos, a former president of the Mongols Motorcycle Club.