Cold-case detectives investigating Colorado’s 1,500 unsolved homicides believe that 24 of those are the work of an as-yet unidentified serial killer, and they are asking the public for help solving the cases.

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On February 7, 1936, most of the remains of Florence Polillo were found behind a vacant house. Days earlier police had found most of the rest of her. Her head was never found. Despite the involvement of Eliot Ness the case of the Cleveland Torso Murderer, aka the Mad Butcher of Kingsbury Run, remains unsolved.

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On January 25, 1947, police found a leather purse and one open-toed pump belonging to aspiring starlet Elizabeth Short, aka the Black Dahlia, a few miles from where her butchered body had been found ten days prior.

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Kentucky State Police are investigating the disturbing unsolved murder of an unidentified Native American woman, who was found scalped and shot to death in a wooded area, as a possible hate crime.

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Over a century ago, Lizzie Borden took an axe and gave her mother forty whacks. When she saw what she had done, she gave her father forty-one — or did she? The classic murder tale that may be the most enduring mystery America has ever produced.

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