In Nantes, France there is a home surrounded by death and mystery. This case involves 5 murders, French nobility, potential DEA involvement, 8 paged letters, shirts that need ironing and closed shutters!! Guys, the shutters are NOT open and the French are REALLY freaking out about it!! 

Cite: Oprahmag, Marie Claire, France24.com, wikipedia & of course Unsolved Mysteries.