Who Is The Murderer?

Riddle: A man was found murdered in his own house on a Sunday morning. His wife called the police. The police questioned the wife and got the following alibis: The wife said she was sleeping. The Cook said he was making breakfast. The gardener said he was picking vegetables. The maid said she was getting the post. The Butler (a personal assistant) said that he was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know?

Answer: The maid. There is no post on Sunday.

Source: https://www.riddles.com/2551

A man was found murdered in his own house on a Sunday morning. His wife called the police. The police questioned the wife and got the following alibis: The wife said she was sleeping. The Cook said he was making breakfast. The gardener said he was picking vegetables. The maid said she was getting the post. The Butler (a personal assistant) said that he was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know? — Who is the murderer? by NEO JIA QI v1.

Riddle: A man was found murdered in his own house on a Sunday morning. His wife called the police. The police questioned the wife and got the following alibis: The wife said she was sleeping. The Cook said he was making breakfast. The gardener said he was picking vegetables. The maid said she was getting the post. The Butler (a personal assistant) said that he was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know? Answer: The maid. There is no post on Sunday. — by NEO JIA QI v2.