This two-part series is a competent and occasionally compelling entry into the documentary sub genre of true crime investigation, telling the story of a case from start to finish. It is difficult for a documentary to match the drama and intensity of a fictional police show because — well, they can’t make up plot twists or dramatic turns. They have to stick to what happened. Sometimes that is enough in this program. I found the victim’s mother to be a sympathetic and observant woman. I may not have watched the entire mini-series if not for her. The main suspect was a very shallow person, a...