FILE No.167Unsolved
In an office, a man was found dead. The office door locks automatically when it closes. A key is needed to enter from outside, but from the inside, simply turning the knob opens it. The key was in the victim's pocket.
The office has no windows. The police said, "It is a locked room; the culprit could not have left without a key."
How did the culprit get out of the office?
If you get stuck, open the hints one at a time, in order.
Do you need a key to open it from inside?
What happens to the door when it closes?
Is "cannot get out" really true?
How did the culprit get out of the office?
Choose the answer closest to the truth.
Turned the knob and walked out normally
The answer is "Turned the knob and walked out normally."
From the inside, just turning the knob opens it. To leave, no key is needed. The door locks automatically when it closes, so it looks like a locked room from the outside.
No spare key, ceiling space, or trace of using the key is mentioned. The key stayed in the victim's pocket.
Because you assume "locked means no way out."
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