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Detective riddle

During a blackout, a famous ruby was stolen from a display. The night watchman claimed he was blinded by a sudden flash of light right before the theft. Detective King arrested the watchman for inside involvement. What exposed his lie?

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: Easy. More like this: Detective riddles with answers or try Truth & Lie Island for a different kind of puzzle.

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