There are three drunk men and a corpse in the room. The men refuse to talk to the police, but they still quickly identified the killer. How?
There was a bottle with a bloody mark left by the murdered man’s head on the table. It was an obvious murder weapon. It had all four men’s fingerprints on it. However, only one man’s fingerprints were turned over. It meant that he was the one who made the strike, holding the bottle like a club.