A policeman on patrol calls his fellow cop on the station... COP 1: Hey, I got a weird case over here COP 2: What is it buddy? COP 1: Im here at the front porch of an elderly couple's house COP 2: So? COP 1: Someone called me to go to this house because they heard shouting and stuff. And you wouldn't believe what happened... COP 2: What happened? COP 1: The wife stabbed her husband to death COP 2: How did you know? COP 1: As she opened the door, I saw her in tears, with fresh blood on her hands, the husband layiing lifeless on the floor beside the murder weapon, and she told everything to me COP 2: What exactly happened before the murder? COP 1: Apparently she has just finished mopping the floor, and her husband just walked inside with his muddy boots on. I guess some pent-up anger just came to a boil. COP 2: Well, that's sad. Have you arrested her? COP 1: Nope. COP 2: Why? COP 1: The floor's still wet.