This document discusses the key elements and conventions of the crime and mystery genre in film. It notes that crime fiction typically involves murders, detectives investigating crimes, and criminals being arrested or punished. Common characteristics of the genre include urban settings where crimes can be easily committed and covered up, titles that reference detectives or crimes, characters like criminals, victims, police, and families, mysteries for audiences to try and solve, the use of lighting, music, and props like weapons. The narrative typically follows a crime disruption, recognition, attempted repair, and new equilibrium.