I have a possible unhealthy obsession with serial killers.

So much so that for a birthday one year, my wife gave me the complete encyclopedia of serial killers. It's kinda weird. But it's not because of admiration or anything. True crime is just fascinating. And I know I'm not the only one. With the sudden vomiting of true crime documentaries from Netflix and the like, it's obvious that the majority of America is obsessed with it as well!

That being said, according to former chief of the FBI's Elite Serial Crime Unit, John Douglas, there are 25 to 50 active serial killers in the United States at any given moment. I know that may make you never want to go outside again, but have no fear. You only have a 0.00039% chance of being murdered by a serial killer.

The FBI defines serial murder as “The unlawful killing of two or more victims by the same offender(s), in separate events”. This differs from mass murderers who may kill multiple people in one event.

So, who are the serial killers that were more than likely identified that were never caught? Here's at least 30 of them: