As for le dépeceur de Mons... What a story. Thanks for letting us know.
Speaking of Francophone unsolved mysteries, the Omar Raddad affair ("Omar m'a tuer") still fascinates.
The season come again for winter’s tales, I tell you one which my nurse told to me As watched I warily the swirling snows. “I’ll raise one up,” she swore, “of ghosts by night…”