Twins Ronnie and Reggie Kray rose to notoriety as nightclub and gambling club owners who were involved in assaults and armed robberies.

The U.S. originally started the federal witness protection program to protect people from the mob. And the people who received protection? They were usually part of the mob too.

A notorious Boston mob boss serving a life sentence for his part in 11 slayings, James 'Whitey' Bulger, 89, was ailing and confined to a wheelchair on October 30, 2018, when he was slain at the U.S. Penitentiary Hazelton. But the details around his death remain murky.

The newly elected sheriff talks about his biggest concerns when filming '60 Days In,' the challenges in his facility before filming and the advice he gave this season's participants.

The December 11, 1978 Lufthansa heist by the Lucchese crime family, which took place at New York's JFK airport, was the most infamous caper in U.S. history.

After the recent high-profile murder of Bronx teen Lesandro Guzman-Feliz, the spotlight is on the gang cops say is responsible, the Trinitarios, and the unique reaction to the violence from the community.

Meet Suge, a top lieutenant with the notorious gang Sex Money Murder (or SMM) as he's preparing to murder, in this excerpt from Jonathan Green's book, 'Sex Money Murder: A Story of Crack, Blood, and Betrayal.'

Some criminals get their crimes tattooed on their bodies, write 'fictional' books detailing murders they've committed or turn their own wanted posters into profile pics on Facebook.  We talk to an expert to better understand why some criminals implicate themselves in their crimes by communicating about them.

MS-13 is not only terrorizing Long Island's village of Patchogue, but has Latinos who live and work there fearful that the gang's presence will contribute to widespread anti-Latino hostility.

Sgt. Sean "Sticks" Larkin, a member of the Gang Unit of the Tulsa Police Department, was a hit with Live PD viewers. Sticks answers our questions about how gangs took root and how to spot if your kid is involved.