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Detective riddle

At midnight, a mansion guard was found tied to a chair in the central hallway. He claimed a masked intruder snuck up behind him, struck him on the left temple, and tied him up before stealing the family silver. Detective Cross shined his flashlight on the guard's face and arrested him for filing a false report. What gave it away?

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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