Fifteen years after his family's murder, Xavier Dupont de Ligonnès remains France's most wanted fugitive. The discovery of an online account active years after his disappearance has revived speculation that he may still be alive.

For more than 15 years, the fate of Xavier Dupont de Ligonnès has remained one of France’s biggest mysteries. The 50-year-old is suspected of having murdered his entire family and burying them in concrete under their home before fleeing the scene. Now, the discovery of an obscure online account – active several years after his disappearance – has reignited speculation that France’s most wanted man may still be alive.