Write a question about the following article.

Well two weeks went by , and my dad had gotten letters form an anonymous person , the person who murdered and kidnapped his family . He went to the police but they did n't believe him . He had to do this by himself , and he was . He finally got the answer to where the person was .

Question:
Why did the police not believe their father ?
Possible answers:
(1). The police believed their father was the criminal ..
(2). Their father did not present enough evidence ..
(3). None of the above choices ..
(4). The police did n't feel like investigating the letter ..