The Black Bird true story follows one mans attempt to uncover evil, yet the show doesn’t cover all the details of the amazing story. The six-episode mini-series follows the story of Jimmy Keene and the serial killer Larry Hall in a faithful adaptation of Keene and journalist Hillel Levins memoir In with the Devil: A Fallen Hero, a Serial Killer, and a Dangerous Bargain for Redemption. The shows twists and turns may seem unbelievable, but the real-life events that inspired Black Bird happened more than 20 years ago and involved a serial killer who is still alive today.
https://screenrant.com/the-true-story-of-black-bird-explained/