" Serial murder may, in fact, be a much older phenomenon than we realize. The stories and legends that have filtered down about witches and werewolves and vampires may have been a way of explaining outrages so hideous that no one in the small and close-knit towns of Europe and early America could comprehend the perversities we now take for granted. Monsters had to be supernatural creatures. They couldn't be just like us. "
― John E. Douglas , Mindhunter: Inside the FBI's Elite Serial Crime Unit