Ep.4 Stacey Ruth Castor may have been one of the most sociopathic female serial killers in modern times. She poisoned her first husband Michael Wallace with anti-freeze after he becomes an inconvenience to her and did the same to her second husband David Castor years later. To know more about the case and the latest updates check this link : https://murderpedia.org/female.C/c/castor-stacey.htm

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