A priceless diamond was stolen from a locked glass display case. The three suspects were the museum director, the night guard, and the head janitor. The director said he was updating the catalog in his office. The guard said he was doing hourly rounds in the west wing. The janitor said he was scrubbing the floor in the main lobby. Detective Thorne noticed a puddle of fresh rainwater directly beneath the pristine glass case, yet it had not rained outside for three days. Who is the thief?
The night guard
A night guard walking rounds would carry an umbrella or track in rainwater from outside, whereas people indoors in offices or cleaning lobbies wouldn't leave a puddle directly under the display case.
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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