Here is a link that says of 62 Horror Films based on true stories : https://www.cosmopolitan.com/entertainment/movies/g19738089/horror-movies-based-on-true-stories/?utm_source=facebook_arb&utm_medium=cpm&utm_campaign=arb_fb_COS_m_and_g19738089&fbclid=IwAR0MVWGXEYFp_4Hi. XCI0i2EwntUu-HuHR8CrjMRtT1zUPhpIchBLpg6llgw
Don’t let it scare you and ya gotta hand it to Hollywood of being creative! Which one do you like the best?
One I just saw was Gacy. I feel that one didn’t explore it too well.