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Detective riddle

A jeweler reported that a thief smashed his display case at midnight and stole a tray of ruby rings. The security guard stated he heard the glass shatter and ran outside immediately, catching a man running down the alley with red-stained hands. Vance let the running man go free and arrested the guard instead. 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: Hard. More like this: Detective riddles with answers or try Truth & Lie Island for a different kind of puzzle.

More detective riddles

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