An eighty-year-old person was living alone in his house. On a sunny Friday morning, while delivering some letters in the mailbox, the postman felt suspicious and decided to look through the window of the house. That's when he saw the old man lying dead on the floor in a puddle of blood. When the police arrived, they found three bottles of milk, the Tuesday’s newspaper, and some gifts in front of the house. The lock of the door was broken, and they already suspected a person. Whom and why?
The police suspected the newspaper boy. Since there were 3 bottles of milk, the old man must have been dead for few days already. However, the last newspaper left in front of his house is from Tuesday. Probably the newspaper boy, knowing that the old man is dead, decided that there is no point to go to his door and deliver newspapers anymore.