5 Terrifying Serial Killer Signatures

The personal stamp in serial killer signatures left at their crime scenes or in the method of their kills can be as frightening as the crimes themselves. 

Richard Cottingham - Wikipedia

The Big Book of Serial Killers: An book by Jack Rosewood

10 Most Famous Female Serial Killers - InsideHook

Serialists: How Male and Female Serial Killers Differ

Zodiac Killer theory: Jarett Kobek uses literary criticism to identify a suspect.

6 of the Most Notorious Serial Killers Who Were Never Caught

How Much for Ted Bundy's Toenails?

CRIME HUNTER: Is the Age of Serial Killers at an end?

20 Best Serial Killer Biography Books of All Time - BookAuthority