The document provides background information on Kingsbury Run, a valley area in Cleveland, Ohio that was the site of unsolved torso murders in the 1930s-1940s. It describes how Kingsbury Run was originally a natural waterway that later became an industrial area and railroad route. In the 1930s during the Great Depression, it became a shantytown inhabited by transients and those on the fringes of society. Between 1934-1938, remains of at least 13 victims were found dismembered along Kingsbury Run, leading to widespread fear of the unidentified "Mad Butcher" killer. Law enforcement struggled to solve the serial murders despite numerous suspects and investigations.