The Antwerp Vault

Cases unlock in order, like levels. This is case 101 of 200.
A diamond exchange building in Antwerp, Monday, 7:10 am. The manager opened the basement vault door and found one hundred and twelve safe-deposit boxes broken open and empty.
The armored door doesn't have a scratch. Whoever got in used the key and the combination, and slipped past the heat, light and magnetic sensors without setting off a thing.
The building was shut from Friday at 7 pm until this morning. Only the basement guard spent Sunday night inside.
Three people know that basement by heart. One of them knows where the stones are.
Meeting room of the diamond building: a glass table with loupesloupe Small magnifying glass used by jewelers and gem cutters to inspect stones. and scales, blinds closed.
Suspects
Maarten ClaesBasement security guard, 54
Ruth AdlerDiamond cutter, third floor, 47
Enzo MorettiStone dealer, 51
The real case
The Antwerp Diamond Centre heist
Antwerp, Belgium, 2003
Read the real case