Homicide Detective

A homicide detective is called at a crime scene. A man is lying dead in front of an abandoned building. It is believed that the man jumped out of a window off the abandoned building and committed suicide.

The detective asks his team to collect evidence and he heads towards the building. He goes to the first floor and towards the room that is on the front side. Inside the room, he lights a cigarette, walks towards the window facing the dead body, opens the window and throws out the cigarette. He then goes to the second floor and repeats the same process.

He keeps doing the same thing till he is done with all the floors and then takes the lift to the ground floor. Upon reaching there, he informs the team that it is not a suicide but a murder.

How did he know that it was a not a suicide?

Answer

If the man had committed suicide, the window that he jumped from should have been left opened. But all the windows facing the dead body were closed. This means that someone closed the window after the man died.

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