Xavier Dupont de Ligonnès is the main suspect in the Nantes quintuple assassination. In April 2011, the bodies of a woman and her four children were found buried under the terrace of the family home, in Nantes.
The father has disappeared. Since then, he has been actively sought by the French police. There have been numerous false leads, false arrests and false reports of missing people. In January 2018, the police carried out a new operation in a monastery in Roquebrune-sur-Argens.