1. The Ken and Barbie Killers: Dead Ringer, Part 1

From 1987 to 1992, Ontario authorities join FBI profilers to hunt the monster re... More

2. The Ken and Barbie Killers: I Kidnapped a Girl, Part 2

After finding their prime suspect, the Ontario authorities uncover disturbing vi... More

3. The Back to School Killer: A Fear in the Air, Part 1

Authorities suspect a local star athlete in the disappearance of two college-age... More

4. The Back to School Killer: Portrait of a Predator, Part 2

While Jesse Matthew Jr. kidnapped and killed at least two women, a third cheats ... More

5. Sammy "The Bull" Gravano: He Makes Money and Murders People, Part 1

After committing multiple murders, Sammy "The Bull" Gravano cuts a deal with the... More

6. Sammy "The Bull" Gravano: They Made a Deal with the Devil Part, 2

As the highest-ranking mobster ever to defect, Sammy Gravano describes the shock... More

7. The Hillside Stranglers: A Pair of Serial Killers, Part 1

In the fall of 1977, bodies of nude and tortured young women begin piling up on ... More

8. The Hillside Stranglers: She Walked into the Trap, Part 2

After receiving reports of strange behavior, detectives realize that the Hillsid... More

9. The Cross Country Killer: He Could Make People Disappear, Part 1

After a woman is kidnapped in Alaska, an intense manhunt takes authorities on a ... More

10. The Cross Country Killer: The Kill Kits, Part 2

After his capture in a nationwide manhunt, Israel Keyes reveals details about hi... More

11. John Gotti: It Was Kill or Be Killed, Part 1

Ruthless mafia gangster John Gotti orders hits on his enemies, his friends and a... More

12. John Gotti: There Were Fatal Consequences, Part 2

In 1985, John Gotti makes a big move when he organizes the murder of the Gambino... More