Waiting for the murderer to show up

Two journalists, Jean-Michel Laurence and Béatrice Fontenau, have published a book about a French criminal affair that remains unsolved, at least in theory : the Dupont de Ligonnès mystery.

Beneath the rear porch of a nondescript house in Nantes, in April 2011, police found the remains of an adult female and four young individuals.

 DNA tests revealed that the bodies were those of Agnès Dupont de Ligonnès and her four offspring: three sons and a daughter.

As for the father, Xavier Dupont de Ligonnès, no trace of him has been found since 15 April 2011, when he was seen leaving a low-cost hotel in Roquebrune-sur-Argens, carrying a bag on his back that might have contained a weapon. The police are looking out for him constantly.