A recent Variety study done with data from FlixPatrol came up with a surprising finding: Netflix's infamous true crime docu-series' viewership is declining. With the exception of "Cocaine Cowboys: The Kings of Miami" and "Tiger King 2," Netflix's 2021 true crime docu-series haven't been breaking the streamer's top 10 U.S. TV series ranking, despite Netflix releasing new true crime docu-series every month this year.