Anatoly Yuriyovych Onoprienko (Ukrainian: Анатолій Юрійович Онопрієнко July 25, 1959 – August 27, 2013) was a Ukrainian serial killer and mass murderer.[2] He is also known by the nicknames "The Beast of Ukraine", "The Terminator", and "Citizen O". After police arrested the 37-year-old former forestry student on April 16, 1996, Onoprienko confessed to killing 52 people