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Detective riddle

The victim was found in a locked hotel room with no signs of forced entry. On the bedside table sat an empty glass of water and an unsealed bottle of pills. The coroner ruled it suicide by poisoning. Detective Thorne looked at the bathroom sink, where the hot water tap was running full blast, and the mirror was completely fogged up. Thorne arrested the hotel manager for murder. Why?

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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