Madam de Brinvilliers: The 'Wickedest Woman in the World'

Marie-Madeleine-Marguerite d'Aubray, Marquise de Brinvilliers was found guilty of poisoning her father and two brothers -- and maybe her husband and daughter. Because her conviction was based on the strength of letters written by her dead lover and a confession that was obtained by torture, her guilt remains uncertain.

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