The widow of a French serial killer known as the "ogre of the Ardennes" goes on trial from Tuesday over her role in three murders dating back several decades, including the killing of a British woman whose body was found in a river in 1990.
Monique Olivier was married to Michel Fourniret, who was charged with abduction, rape and murder in the cases but died in 2021, aged 79, before he could be brought to trial.
