The most dangerous active serial killers in 2020

In a world that tends to frown on murdering your fellow man, serial killers are often considered the worst of the worst. Yet, they're very, very real. It's borderline unbelievable that anyone would choose to kill people over and over again. It's even harder to believe that there are actually plenty of people like that out there: According to the Atlantic, the FBI believes that under one percent of all unsolved murders are the work of serial killers. Meanwhile, Thomas Hargrove of the Murder Accountability Project thinks that as of 2019, the U.S. alone had something like 2,100 unidentified serial killers running around. Author and former police detective Michael Arntfield thinks that the number could be as high as 4,000.

Obviously, we have no way to know for sure which of these undiscovered serial killers are most terrifying, because, well, they haven't been caught yet. Still, we definitely do know about some of them ... and what we know is pretty scary. Let's take a look at some of the most dangerous serial killers who are still out and about in 2020.