A ship's captain was found murdered in his locked cabin. There were no weapons inside, no secret passages, and the portholes were too small for a human to fit through. The only liquid in the room was a puddle of melted ice under the desk. Detective Drake solved the case with a smile. How was the captain killed?
An icicle
The killer used a sharp icicle as a weapon to stab the victim. Once the cabin temperature warmed up, the weapon melted entirely into a puddle, leaving no physical trace behind.
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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