They have been doing this in horror flicks for years!
https://en.wikipedia.org/wiki/Elizabeth_B%C3%A1thory
Countess Elizabeth Báthory de Ecsed
7 August 1560 – 21 August 1614
was a Hungarian noblewoman from the family of Báthory, who owned land in the Kingdom of Hungary (now Hungary,Slovakia and Romania)
Báthory has been labeled by Guinness World Records as the most prolific female murderer, though the number of her victims is debated.[2] Báthory and four collaborators were accused of torturing and killing hundreds of girls and women between 1590 and 1610.[3] The highest number of victims cited during Báthory’s trial was 650 but this number comes from the claim by a servant girl named Susannah that Jakab Szilvássy, Báthory’s court official, had seen the figure in one of Báthory’s private books. The book was never revealed and Szilvássy never mentioned it in his testimony.[4] Despite the evidence against Báthory, her family’s importance protected her from a death sentence. She was imprisoned in December 1610 within Castle of Csejte, in Upper Hungary (now Slovakia).
Stories describing Báthory’s vampiric tendencies, such as the tale that she bathed in the blood of virgins to retain her youth, were generally recorded years after her death, and are considered unreliable.