Mary Ann Cotton: Britain's First Female Serial Killer

Retired FBI agent and criminal profiler Candice DeLong examines the disturbing case of Mary Ann Cotton, the Victorian-era poisoner who used arsenic to systematically eliminate husbands, stepchildren, and even her own children across nearly two decades in Northeast England. Behind the facade of a grieving widow was a calculating killer who collected insurance payouts and cleared the path to her next financial and romantic opportunity with each death. Candice digs into what drove Mary Ann to view her own families as disposable and how her modus operandi and the time period allowed her to stay under the radar for so long -- killing at least 21 people in the process.

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