The "Mushroom Murders" Of Vendays - Accused Win Sister Breaks Down And Withdraws Her Confession - Paule Guillou, accused of the "mushroom murders" in Vendays, near Bordeaux in France. Townsfolk of Vendays, near Bordeaux in France, are absorbed in the "mushroom murders", the biggest poison mystery which has faced the French authorities for 25 years. Paule Guillou, 25-year-old dispenser employed with her twin sister Armande in a chemist's shop in Vendays, is accused of poisoning M. Ferlut (her employer), his wife, and his son Dr. Ferlut, by means of arsenic mixed in a dish of mushrooms. January 05, 1946.