A suspicious fire destroyed a warehouse. The night watchman claimed he was inside the office doing paperwork when the smoke detector went off. Fire Marshal Reed inspected the office and arrested the watchman for arson. What gave him away?
The smoke detector
The watchman claimed he was in the office when the smoke detector went off, but the office door was wide open and the smoke detector in the hallway had its battery removed hours earlier.
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: Hard. More like this: Detective riddles with answers or try Truth & Lie Island for a different kind of puzzle.
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