I am partway into a true crime book about the Golden State Killer, I'll Be Gone in the Dark: One Woman's Obsessive Search for the Golden State Killer by Michelle McNamara. Despite the author's obsession with unmasking the Golden State Killer, all of the hours and years she put into it, she passed away before the book was completed and published. Her husband and editor (?) put it together and wrote what they could from her notes. Michelle McNamara did not live to see the Golden State Killer caught using DNA evidence. It looks like there is an afterword in the book to cover that.