The curator swore the rare sapphire was stolen between midnight and 3 AM while he slept in the next room. Detective Vance checked the desk lamp near the broken glass; the bulb was hot to the touch at 3:05 AM. Why did Vance immediately arrest the curator?
The curator
An incandescent light bulb cools down within minutes when turned off. A hot bulb at 3:05 AM proves the light was on shortly before, meaning the curator was awake tampering with the glass to fake a break-in.
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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