Dead Man in a Hut
One day, the police found a man dead inside a hut. In his left hand, he was holding a gun. In his right hand, he had a recording device. When the recording was played, the police heard the man talking about how horrible his life was and how he wanted it to end. The recording ended with a gunshot. The police was about to call it a suicide until one detective pointed out a very important clue. What was it?
If the man shot himself with the gun, then he would not have been able to stop recording with the device.