It's content about people who were killed. Unless you are a police officer, a juror, or a reporter trained in the field, you do not need to see it.
War history is about people who were killed. Unless you are a world leader or professional historian, you do not need to see it.
Knowing about it and learning about it is one thing. Wanting to actually see it as it happen is completely different. Good example, Christine Chubbuck, we already know what happened and how it happened, Why do we need to see it as it happened? Its not necessary and we don't need the families to be retraumtized by looking for material related to their loved ones dying. It's out of respect.