The Kingsbury Run Murders were likely the work of a serial killer known as the Torso Murderer, because he beheaded and often dismembered his victims. He killed 12 people in Cleveland, Ohio between 1935 and 1938, and was never caught.
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Dead Men Do Tell Tales
Illustrated recounting of the Kingsbury Run murders.
Encyclopedia of Cleveland History: Torso Murders
Brief illustrated overview.
The Kingsbury Run Murders
Detailed overview with photographs, from the Cleveland Police Museum.
Wikipedia: Cleveland Torso Murderer
Entry in Wikipedia includes speculation about the killer's identity and possible additional victims.