Here are the true stories of some of history’s most horrific murders for which no perpetrator was ever found.

          The list of unknown murderers and deaths from causes unknown is a long one: the deaths for which Lizzie Borden was tried and acquitted; the multiple murders attributed to the New Orleans Axeman, and those of the "Mad Butcher of Cleveland"; the killing of Lord Erroll and the horrific Black Dahlia case; the Croydon poisonings; the suspicious account of the last hours of Marilyn Monroe. These and many more tales are a chilling reminder of how often those guilty of murder remain free to walk among us.

          Clear presentation of the crimes and evidence that have baffled police and criminologists over the centuries. Absorbing and disturbing accounts of some of the most strange and brutal killings never resolved.