A wealthy merchant was poisoned at his dinner table. Five people were present: his wife, his son, the butler, the cook, and a business partner. Each person claimed they only ate or drank items that were shared by everyone else. Detective Hayes noticed that only the merchant died. The food was tested and found to be completely non-toxic. How was the merchant murdered?
The poison was on the rim of his drinking glass.
If the food and drink inside were non-toxic and shared by all, applying poison exclusively to the rim of the merchant's personal glass would ensure only he ingested it when drinking.
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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