A rare diamond was stolen from a museum display case during a total blackout. Three suspects were in the room: the guard, the curator, and the cleaner. Each claimed they were standing completely still in the dark. The guard wore a mechanical watch, the curator held a heavy brass lantern, and the cleaner carried a metal bucket of water. Only one person's story was physically impossible. Who stole the diamond?
The guard
Mechanical watches require movement of the wrist to stay wound and run; if the guard was standing completely still in the dark, his watch would have stopped.
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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