29. Darya Saltykova: The Bloody Countess
Darya Saltykova was a Russian countess who was convicted of beating and torturing at least 38 of her servants to death, almost all of whom were women. Even though she was charged for 38 deaths investigators found almost 138 deaths that could be linked to her.
Darya was married young to a very wealthy and famous Saltykova family. But he died when she was 25, and she began living in a large estate with her children, and with a very large number of servants. That was a setting were these bloody crimes played out.