A man was on Sunday Jan 7, 2007. His wife called police. Police asked questions to everybody in that house.
Wife: I was sleeping when my husband was murdered.
Cook: I was cooking.
Gardener: I was watering flowers.
Servent: I was in the post office.
Children: We were playing.
Neighbors: We were attending a wedding.
The policed arrested the murderer instantly! Can you tell who was that murderer?