Exploring the rise and fall of America's most notorious criminals.
Vincent Smothers was one of Detroit's most notorious killers but he didn't start out that way.
James `Whitey' Bulger is one of the most notorious organized crime bosses in American history.
Hortencia Medelles-Arguella was the mastermind of the biggest sex ring to be busted in Texas.
The face behind Silk Road, the online marketplace for illegal drugs, Ross William Ulbricht.
Known as the Monster of Atwater Village, Timothy McGhee was a big part of the Toonerville gang.
Marvin Mercado and his brother, Pierre were major players in the Asian Boyz gang in the 1990's.
Louis Eppolito and Stephen Caracappa give their Mafia cohorts vital confidential information.
David Thai is the leader of the Born to Kill gang, a group that terrorizes New York's Chinatown.
Head of the Montreal Mafia, Vito Rizzuto oversees an empire fueled by drug trafficking.
The Harvey Hustlers gang dominates the streets of Harvey, La., for three decades.
Richard Kuklinski, one of the most notorious killers in American history.
Profiling the ruthless drug dealer and murderer; Savage commits murder to protect his interests.
John Gotti was the last of the classic gangsters; unlike other mafia chiefs, he loved attention.
Salvatore "Sammy the Bull" Gravano, the most notorious turncoat in mafia history.
Omar Portee, aka OG Mack, creates the United Blood Nation and watches it spread.
Juan García Ábrego's cocaine smuggling empire grows to an estimated $10 billion.
The Aryan Brotherhood of Texas is a white supremacist gang that boasted thousands of members.
Danny Greene was a notorious underworld figure; he started a war with the Cleveland Mafia.
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.
Cabrera's criminal history dates back to his youth in the Santa Cruz, Calif., area.
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.
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.
A Mexican drug lord and former leader of the Sinaloa cartel receives the title of biggest drug lord.
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.
Edgar Villareal climbs to a top position in the enforcement squad called Los Negros.
The '80s are remembered for big hair and neon lights; another popular staple was cocaine.
Spilotro was an enforcer for the Chicago Outfit and was assigned to protect the Las Vegas skim.
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