One fateful sunday morning, there was a murder. There were three suspects: The cook, the mailman, and the victim's wife. A detective came and asked who killed him to the suspects. The wife said that she wouldnt kill him because she was earning a living of his money, and she loved him. The mailman said that he just delivered the mail and then left. The cook said he was cooking at the time of the murder, and that he heard a scream from the victims room. When the cook went there, all he saw was the victims body, and the wife crying. The wife agrees to this. Who killed the victim, and how do you know?