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The Wet Window Frame (illustration)
FILE No.122Unsolved

The Wet Window Frame

Difficulty ★★☆about 5 minLocked RoomTracesWeather
On a rainy night the window is closed, yet only the floor inside the window is wet.

Case Record

On a rainy night, cash was stolen from a second-floor room. The room's door is locked from the inside. The window is closed but not locked.

There is a puddle only on the floor inside the window. The water continues in dots shaped like footprints from under the window into the room. The curtains are not wet. The rest of the room is dry.

Your question

Where did the culprit come and go?

Case Files

Diagram

The room seen from aboveDoor (locked inside)Window (shut, not locked)Wet footprints lead in from under the windowEverywhere else is dryRainy night. Puddles only on the floor just inside the window. The curtainis dry.
Diagram

Hints

If you get stuck, open the hints one at a time, in order.

Open hint 1

Where does rainwater get in?

Open hint 2

Where only did the water fall?

Open hint 3

Was the window locked?

Solve It

Your question

Where did the culprit come and go?

Choose the answer closest to the truth.

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The Truth

Came and went through the window and closed it from outside

The answer is "Came and went through the window and closed it from outside."

If you open a window on a rainy day, rain gets in only on the floor just inside the window. The window is not locked, so it can be closed from outside. The rest of the room is dry, so water fell only inside the window.

The door is locked from the inside, so there is no way to lock it from outside. There are no traces of water on the ceiling or under the floor.

Why the rain came inThe culprit opens the window and goes in and outRain falls only on the floor just insideFrom outside, the window is pulled shutThe door stays locked from insideThe window was not locked, so it could be closed from outside.
Diagram of the solution

Key Points

  • Focus on where the water fell
  • Evidence that the window was opened
  • Check the condition that allows closing it from outside

Why people get fooled

Because when the window is closed, you think it was never opened.

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