1. 33. Gone in the Dark: The 40-Year Hunt for the Golden State Killer

- Photo Credit: Wikimedia Commons
2. Inside the Demented Mind of John Wayne Gacy, Jr.

- Photo Credit: Murderpedia
3. The Zodiac Killer

- Photo Credit: Wikimedia Commons
4. Bathed in the Blood of 650 Virgins: Elizabeth Bathory, The Blood Countess

- Photo Credit: Wikimedia Commons
5. Mary Ann Cotton: England’s First Serial Killer

- Photo Credit: Wikimedia Commons
6. Joseph Vacher: The Killer of Little Shepherds

- Photo Credit: Wikimedia Commons
7. The Red Ripper: Russia’s Deadliest Serial Killer

- Photo Credit: Murderpedia
8. Raymond Fernandez and Martha Beck: The Lonely Hearts Killers

- Photo Credit: Bettmann / Getty Images
9. The Harpe Brothers: America’s Original Serial Killers

Illustration by Frederic Remington
Photo Credit: Murder by Gaslight
10. 8 Bodies in the Attic: The True Crimes of Serial Killer Kendall Francois

- Photo Credit: Photo courtesy of the State of New York
11. The Copycat Killing Spree of the Yorkshire Ripper

- Photo Credit: Murderpedia
12. Hotel of Horrors: The Murder Castle of Dr. H.H. Holmes

- Photo Credit: Wikimedia Commons
13. Death Shift: The Texas Infant Murders of Nurse Genene Jones

- Photo Credit: Photo courtesy of author Peter Elkind
14. The Perfect Psychopath: Dr. Petiot’s Heinous Crimes During World War II

- Photo Credit: Murderpedia
15. Gary Ridgway: The Green River Killer

- Photo Credit: Wikimedia Commons
13. Kiss of Death: The Bloody Case of Béla Kiss

- Photo Credit: Wikimedia Commons
16. The One, Tiny Mistake That Finally Took Down The Night Stalker

- Photo Credit: Murderpedia
17. Death in the Heartland: The Murder Spree of Charles Starkweather

- Photo Credit: Wikimedia Commons
18. Aileen Wuornos: Depraved Serial Killer Or Countercultural Icon?

- Photo Credit: Open Road Media
19. This Serial Killer Murdered 13 Women in Their Own Homes Without Breaking and Entering

- Photo Credit: Bettmann / Getty Images
20. Fritz Haarmann: The Vampire of Hanover

- Photo Credit: Wikimedia Commons
21. John Christie: The Whispering Killer of England

- Photo Credit: Hulton Archive / Getty Images
22. Angels of Death: Cathy Wood and Gwen Graham

- Photo Credit: Kent County Sheriff’s Department
23. Date with the Devil: Paul John Knowles, the Casanova Killer

- Photo Credit: Wikimedia Commons
24. Teen Bride Turned Serial Killer: The Judith Neelley Case

- Photo Credit: Murderpedia
25. Dennis Nilsen: Britain’s Kindly Killer

- Photo Credit: Wikimedia Commons
26. Madame Delphine Lalaurie: The Most Evil Woman in New Orleans

- Photo Credit: Via melty.es
27. Michigan Murders: The Heinous Crimes of the “Ypsilanti Ripper”

- Photo Credit: Murderpedia
28. Leonarda Cianciulli: The Deadly Soap-Maker of Correggio

- Photo Credit: Wikimedia Commons
29. Robert Berdella: The Butcher of Kansas City

- Photo Credit: Kansas City Police Department / Murderpedia
30. Belle Guinness: The Black Widow of the Midwest

- Photo Credit: Wikimedia Commons
31. The Acid Bath Murderer of England

- Photo Credit: Murderpedia
32. American Boogeyman: The Disturbing Case of Albert Fish

- Photo Credit: Wikimedia Commons
33. Steve Wright

- Photo Credit: Wikimedia Commons
34. House of Horrors: The Heinous Crimes of Fred and Rosemary West

- Photo Credit: Alchetron
35. Nightmare in Kansas: The Chilling Case of BTK Serial Killer Dennis Rader

- Photo Credit: Murderpedia
36. David Parker Ray

- Photo Credit: Wikimedia Commons
37. Jeffrey Dahmer

38. The Twisted Case of Robert Hansen, an Alaskan Serial Killer Who Hunted Down His Victims

- Photo Credit: Murderpedia
39. The Creepy Case of Serial Killer Tony Costa and His Garden of Horrors

- Photo Credit: capecast / YouTube
40. Metal Fang: Russia's Serial Killer Cannibal

- Photo Credit: Murderpedia
41. Alexander Pichushkin, Russia's Chessboard Killer

- Photo Credit: Murderpedia