Michelle McNamara was an American true crime writer and journalist, best known for her work on the unsolved case of the Golden State Killer. She gained widespread recognition for her blog, True Crime Diary, where she explored various criminal cases and shared her insights. In 2018, her posthumously published book, I'll Be Gone in the Dark, detailed her investigation into the Golden State Killer and contributed to renewed interest in the case. McNamara's writing style combined meticulous research with a personal narrative, making her work both engaging and impactful in the true crime genre.