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Detective riddle

The victim was found in a locked room with no signs of forced entry. On the desk sat a glass of water with a floating ice cube and a pool of spilled ink. Detective Marsh deduced the victim had died of natural causes hours before. How did the ice cube help him?

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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