Author Barbie Latza Nadeau on how Italian women have played vital roles in mafia history, and have done anything—from keeping secrets to murder—for their families.

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

For over a decade, Whitey Bulger was America's most wanted gangster—the FBI's biggest domestic target. Wanted for 19 counts of murder, he hid in plain sight for 16 years with his girlfriend Catherine Greig. Read how he was caught.

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.

Dominick Polifrone gained the confidence of the contract killer in an undercover operation that almost cost him his life.

Mafia 'freelance contractor' and actor Gianni Russo spoke to A&E True Crime about his polio-afflicted childhood in the Little Italy section of New York City to friendships and feuds with legendary mob figures like Frank Costello and John Gotti.

Journalist Murray Weiss, who has covered organized crime for over 30 years and who is now at CBS News, tells us why working-class people loved John Gotti, how the Mafia has changed since the 1980s and what it was like for John Gotti Jr. to leave the mob.