A priceless diamond was stolen from a locked glass display case. The guard swore nobody entered or left the room, yet the case is empty, unbroken, and the key is in the guard's pocket. How did the thief get the diamond?
The diamond was frozen into an ice sculpture
The thief placed a block of ice shaped like a diamond inside the case prior to the exhibit, or substituted the real diamond with an ice replica that completely melted away before the theft was discovered.
About this riddle
Detective riddles are tiny mysteries. Look for the detail in the story that does not fit; it is usually the clue that solves the case.
Difficulty: Hard. More like this: Detective riddles with answers or try Truth & Lie Island for a different kind of puzzle.
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