At the scene of the art gallery heist, three suspects claimed they were viewing the new abstract sculpture in the back hall when the alarm sounded. Detective Rossi checked their shoes and immediately identified the liar. What did she see?
Dry shoes
Wait, the sculpture was surrounded by a decorative indoor fountain or the gallery had just been mopped? Let's make it simpler: Rossi saw mud on the suspect's shoes, but the gallery floor was spotless marble and it hadn't rained outside. Or, the back hall floor was covered in spilled water/paint, yet one suspect's shoes were completely clean.
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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