A museum curator was found stabbed in his office. The window was locked from the inside, and the heavy wooden door was bolted shut. The only key to the deadbolt was in the curator's trouser pocket. On his desk sat a half-eaten sandwich and a note reading 'Beware the janitor.' Vance inspected the door and arrested the janitor. How did the killer escape?
The killer slid the key back under the door
The killer locked the door from the inside, slipped the key under the crack of the door to the outside hallway, and left the curator's pocket empty.
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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