The Denver Strangler was an unidentified serial killer operating in Denver, Colorado from 1894 to 1903. He was responsible for killing three prostitutes in the span of 10 weeks in 1894, and although many suspects were arrested, nobody was convicted. The Strangler is also supposedly responsible for the 1898 murder of clairvoyant Julia Voght and 1903 murder of Mabel Brown, but this remains only speculation.