Director James Toback is in the ring with former heavyweight champion Mike Tyson on a feature documentary that traces how the fighter self-destructed and let a fortune and his ring legacy slip away.Toback will prepare "Tyson" using more than 30 hours of recently completed interviews with the ex-champ. The director said his subject pulls no punches in chronicling every aspect of his rise and fall.Damon Bingham, Harlan Werner, Tyson and Toback are producing. The film will be finished in the fall, and ICM will sell worldwide rights.After the boxer emerged clean and sober following a recent rehab stint, Tyson and Toback decided it was time to tell his story in detail, from his time under the wing of promoter Don King to his conviction for sexual assault."The point is not to polish his image or make a cinematic apology, but rather to get a firsthand look at a very complex and epic story," Toback said."He was honest about all the things that have highlighted his life, from the bitter divorce, the ear-biting, prison, to his becoming a sex addict. He is self-aware, smart and a totally fractured personality, and he made himself completely vulnerable." Tyson said he was "humbled and appreciate that Mr. Toback gave me an opportunity to be involved in this project. I will, to the best of my abilities, give a truthful account of myself."