What serial killer killed the most?

Related questions

1. What was the deadliest day?
2. How many Russian soldiers were killed in ww1?
3. What is the deadliest event in human history?
4. Did more soldiers died in ww1 or ww2?
5. How many Germans died on D Day?
6. What was the best rifle in ww1?
7. What was the worst weapon used in ww1?
8. What is the weakest gun in the world?
9. What wars has Russia lost?
10. How many soldiers drowned on D Day?

Tags

1. #medical
2. #modern
3. #kills
4. #killer
5. #killers
6. #professionals
7. #count
8. #prolific
9. #known
10. #highest
11. #possibly
12. #victim
13. #below
14. #serial
15. #shipman
16. #proven
17. #harold