A man suddenly killed his wife in their own garden and left no evidence (chứng cớ). The next day, he was called to the crime scene (hiện trường tội ác) by the police. The man quickly went to the garden and the police arrested him at once. How could the police know he killed his wife?
The police knew the man killed his wife because when they called him to the crime scene, he went straight to the garden without any indication from the police about where the crime had occurred. His knowledge of the specific location of the crime (the garden) before being told by the police served as an indication that he was involved in the murder.