Murderinos, rejoice: There's another true crime series coming your way. HBO Documentary Films will make Michelle McNamara's bestselling book I'll Be Gone in the Dark: One Woman's Obsessive Search for the Golden State Killer into a documentary series. In the book, the late McNamara investigates the identity of a rapist and murderer who terrorized California in the 1970s and '80s. Nancy Abraham and Lisa Heller, the executive vice presidents of HBO Documentary and Family Programming, made the announcement in a press release Monday.