Gangsters: America's Most Evil

A notorious founder, Hoover starts one of the first street gangs that was run as a business.

By the time Perrion is in her 20s, she becomes a drug queenpin, with ties to Mexican drug cartels.

Shauntay Henderson was one of the handful of women to appear on the FBI's Most Wanted List.

A Mexican drug lord and former leader of the Sinaloa cartel receives the title of biggest drug lord.

Edgar Villarreal climbs to a top position in the enforcement squad called Los Negros.

Bey is known as the Philly Intimidator, and he was a key player in the Kaboni Savage Organization.

Young Boys Incorporated was a violent drug-trafficking gang founded in Detroit in the late '70s.

Scarfo rose to power during one of the bloodiest periods in Philadelphia organized crime history.

Giancana is connected to conspiracy theories involving both the Kennedy family and Fidel Castro.

Spilotro was an enforcer for the Chicago Outfit and was assigned to protect the Las Vegas skim.

Chester Campbell served two sentences in prison, but he is believed to be connected to more murders.

Eddie Nash was a nightclub impresario who used drug trafficking to build a fortune.

The '80s are remembered for big hair and neon lights; another popular staple was cocaine.

Cabrera's criminal history dates back to his youth in the Santa Cruz, California area.