Who are/were the most dreaded serial killers in the world?
Who is the most infamous serial killer in the world?
Who is the biggest mass murderer in history; i.e.,  responsible for killing most people? Which are the most common mental illnesses most serial killers have? Who was the most notorious sniper in all of history? Who is the cruelest person in history? Who is the cruelest person through-out history? Who is the worst person in history and why? Who is currently the most famous person alive? Who is in the top 10? Who is the worst person in the history of the world? Who has killed the most people with his hands (or holding a gun) in history? Who is the most famous person on Earth? Why do serial killers kill? Who is the worst person in the world? Who is the most famous human being ever? Who was the most famous man in the world? Who is the most famous man in the history of the world? Who are the most evil humans in history that most people have never heard of? Who is the most powerful and dangerous villain in Marvel Universe? What famous person had the most tragic death? Who is most famous person who ever lived? What are some interesting stories about serial killers and how they were caught? Who is the world's greatest thief ever? Who is the most famous person of the 20th century? Who is the most powerful predator? Who's the worst person you know? Was Benjamin Franklin a serial killer? Who was the biggest traitor in the history of mankind? Who is the worst person in this world? Who is the most evil person to have ever lived? Who is the most important evil person in history? Who was the most unfortunate person in the history of mankind?