February 20, 1959 - Anatoly Onoprienko
Onoprienko carried out his killings across rural Ukraine in two separate periods of violence, targeting families in their homes and leaving few survivors to identify him. His ability to operate undetected for years — and across a wide geographic range — reflected both the scale of his crimes and the investigative limitations of the post-Soviet period in which they occurred. The confession of fifty-two murders placed him among the most prolific killers documented in Ukrainian criminal history.
From Wikipedia
Anatoly Yuriyovych Onoprienko (Ukrainian: Анатолій Юрійович Онопрієнко; Russian: Анато́лий Ю́рьевич Оноприе́нко, Anatoly Yuryevich Onoprienko; 25 July 1959 – 27 August 2013) was a Soviet and Ukrainian serial killer and mass murderer. Known by the nicknames The Beast of Ukraine, The Terminator, and Citizen O, Onoprienko confessed to killing fifty-two people upon being apprehended in April 1996.
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