My idea is that a girl, an average high-school girl who is constantly in the shadows, is thrown into a rape/murder case because while leaving a club she witnessed the actual act. But she was in a state of shock that left her unable to remember the face that ran past her out of the alleyway which is the scene of the crime. Eventually, a year or so after the case is closed she suddenly dreams of the event that has haunted her for years and sees the face that ran away. But she doesn't take it to the police because it is someone she knows and cares about. (I haven't decided who yet). So she decides to investigate herself. I want to alternate between this girl and the man committing the crimes, so you get two POVs and a full circle story, but is it too common or too much?