Selection of Genre ( My opening genre)

 The Genre of my Film is Crime Mystery.

A genre of film that revolves around the solution of a problem or a crime. It focuses on the efforts of the detective, private investigator or amateur sleuth to solve the mysterious circumstances of an issue by means of clues, investigation, and clever deduction.

As  I am supposed to make an opening of film so the scene revolves around the character  who is a DID patient. His other personality make him murders the girl who rejects him, as a form of revenge . A series of camera conventions would help me to achieve the goal of fulfillment of the conventional enigma. This would keep the viewer in curiosity as they would likely think what will happen afterwards?. 

Will there be someone who will expose the guy and his disorder?. This is what makes my opening film as a mysterious film.