FROM THE VAULT | Today, we dive into one of France's most haunting true crime mysteries: the Dupont de Ligonnès murders, also known as the Nantes murders. In April 2011, five members of the Dupont de Ligonnès family were found buried beneath the patio of their home, sparking a nationwide manhunt and leaving the world gripped by unanswered questions. At the center of the case is Xavier Dupont de Ligonnès — husband, father, and the prime suspect — who vanished without a trace.