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Detective riddle

A wealthy businessman was found dead in his locked mansion. The coroner determined he died of natural causes. The housekeeper swore she saw a masked intruder leap out of the second-story window right before she found the body. The detective thanked her and arrested her for perjury. Why?

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

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