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Detective riddle

Inspector Gray found a dead man in a closed car with all the windows rolled up tight and the doors locked from the inside. The engine was cold, the gas tank was empty, and there were no signs of trauma. On the passenger seat lay a map of the mountains. What caused the man's death?

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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