I had heard about an infamous serial killer from Colombia, and Wikipedia browsing eventually brought me to "serial killers by number of victims". Weirdly, the top four are all from South America. I don't mean to disparage, but is there a particular reason for this, or is it purely a coincidence?

by serenity78
drylaw

​ There's definitely more room for discussion here, and it's far outside my own expertise but you might find this recent discussion interesting (its Colombian focus also leaves out 1 out of the 4 serial killers): Especially this part by u/Yorambo on

The top 3 serial killers with the most confirmed kill counts were all Colombians, although they were active in different periods. Was there any socioeconomical or cultural explanation to this?