True crime documentaries are films or series that explore real criminal cases, often focusing on the details of the crime, the investigation, and the legal proceedings. They aim to provide viewers with an in-depth understanding of the events surrounding the crime, including interviews with law enforcement, witnesses, and sometimes even the perpetrators. These documentaries often highlight infamous cases, such as those involving serial killers or unsolved mysteries, and can include various formats, from investigative journalism to dramatized reenactments. They appeal to audiences interested in psychology, law, and the complexities of human behavior.