As macabre as the subject matter may be, there's something alluring about serial killers that we can't help but be drawn to. They've been the fascination of the mainstream media and the public at large for decades.
The topic of murder and serial killers, in general, has spawned an entire generation of true-crime lovers. So for those who happen to fall into this category, here are some little-known facts about some of the world's most notorious serial murderers.