Dupont de Ligonnès murders and disappearance

The Dupont de Ligonnès murders and disappearance also known as the "Nantes massacre" (French: tuerie de Nantes) involved the murder of five members of the same family in Nantes, Loire-Atlantique, France, followed by the disappearance of the patriarch of the family, Xavier Dupont de Ligonnès. His wife, Agnès Dupont de Ligonnès, and their four children, Arthur, Thomas, Anne, and Benoît, along with the family's two dogs, were killed on an undetermined day in early April 2011.

Source: Wikipedia — Dupont de Ligonnès murders and disappearance (CC BY-SA 4.0)