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Detective riddle

A priceless diamond was stolen from a locked glass display case. The guard swore nobody approached it. Detective Miller noticed a puddle of clean water directly beneath the case, even though the roof had no leaks and the day was bone dry. What happened to the diamond?

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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