Any act in Islam should be driven by a voluntary intention. Watching and reading crime and mystery fiction may include scenes which are prohibited to watch or even to read. It may even make a Muslim more familiar with those scenes.

 

By the process of time he/she may watch or read them normally even without denying or showing contempt to them. Furthermore, it may turn his attention from preferred acts of worship such as seeking religious knowledge or praying on time. It may at least turn a person’s heart into a state of oblivion and forgetfulness.

 

Allah Almighty knows best.