A wealthy merchant was poisoned at a dinner party. Four guests drank the exact same spiced wine from identical goblets. Only the merchant died. The host explained that the poison must have been in the merchant's private decanter. The detective tasted the wine from the merchant's decanter and found it completely untainted. How did the killer administer the poison?
The poison was on the rim of the goblet.
If the wine inside the decanter was clean, the poison was applied directly to the rim of the merchant's specific goblet, transferring to his lips as he drank.
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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