Mr.Mason was a rich man. He lived in a mansion. One day, at 5:30 PM Mr. Mason was found killed lying down next to his bed. His wife Mrs. Mason called the police. There are 5 people: maid, cook, gardener, wife, and brother.The maid said she was cleaning the stairs. The cook said he was cooking breakfast. The gardener said he was watering the plants. The wife said he was sorting her diamonds. The brother said he was sleeping. Who killed Mr. Mason??
It was most likely
The cook gave the reason that he was cooking breakfast, but Mr. Mason was found in the evening. This indicates that the cook believed that the murder occurred in the morning, which would only be known to someone present during the crime. Not reporting it until the corpse was found makes the cook at an accomplice, or the murderer if we assume there is only one criminal.
The cook because... she said she was cooking breakfast, suggesting she thought the murder was in the morning (you dont eat breakfast in the evening.) He was not found till the evening. Why wouldn't she tell anyone in the morning??? Because it was her who did it, most likely.