From 1987 to 2003, Michel Fourniret established himself as the most notorious serial killer in France. However, the role of his wife, Monique Olivier, in all of this remained a mystery to the public. Was she a pawn in her husband's cunning plans or did she actively assist him in his cruel crimes? This is yet to be determined. The couple met when Michel Fourniret was serving time in prison for sexual assault. They began corresponding and made a pact when he was released from prison...