A suspect claims he was at the library during the robbery, but the librarian insists he never checked in. What piece of evidence could prove his guilt?
Category: Mystery · Difficulty: hard
Hint: Think about what records are kept in a library.
Answer
A late book return receipt
Explanation
A receipt for a late return would show he was indeed there, contradicting the librarian's statement.
This is a hard mystery riddle — a tricky one that takes a little thought. The answer is A late book return receipt.
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