An antique pocket watch was reported stolen from a locked glass display case at a heritage center. The curator claimed the thief must have used a master key because the lock showed no signs of forced entry. Detective Hayes examined the display case and noticed a tiny scratch on the inside frame of the glass door. Hayes smiled and accused the curator of staging the theft. Why?
A pick or scratch on the inside frame proves the lock was manipulated from within the case, or the door was open when marked.
A scratch on the *inside* frame of a locked case means the tool was applied from the inside, indicating the case was opened normally or manipulated from within, disproving an outside break-in.
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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