3. The Keepers
IMDb Rating: 8.5
Netflix original, this 7-episode mini-series, the next one on the list of best true crime documentaries on Netflix revolves around the murder of sister Catherine Cesnik in 1970 that remained unsolved to date. Besides telling the story and covering the various aspects of the event, this series deals with potential motives for Cesnik’s murder including her reveal that two priests were members of sexual abuse network.