Gangsters: America's Most Evil

Louis Eppolito and Stephen Caracappa give their Mafia cohorts vital confidential information.

The Harvey Hustlers gang dominates the streets of Harvey, Louisiana for three decades.

Richard Kuklinski, one of the most notorious killers in American history.

John Gotti was the last of the classic gangsters; unlike other mafia chiefs, he loved attention.

Profiling the ruthless drug dealer and murderer; Savage commits murder to protect his interests.

Head of the Montreal Mafia, Vito Rizzuto oversees an empire fueled by drug trafficking.

Salvatore "Sammy the Bull" Gravano, the most notorious turncoat in mafia history.

David Thai is the leader of the Born to Kill gang, a group that terrorizes New York's Chinatown.

The Aryan Brotherhood of Texas is a white supremacist gang that boasted thousands of members.

Juan García Abrego's cocaine smuggling empire grows to an estimated $10 billion.

Omar Portee, also known as OG Mack, creates the United Blood Nation and watches it spread.

Anibal Mustelier was one of the most dangerous criminals of the Cocaine Cowboy days in Miami.

The Johnston Gang terrorized the Mason-Dixon Line throughout the 1970s, intimidating victims.

Danny Greene was a notorious underworld figure; he started a war with the Cleveland Mafia.