Shapiro's book is sketchy on legal details, abundant with stories about his celebrity run-ins, the toll the trial took on his wife and two boys, and the relationships among the army of lawyers on both sides of the case. I don't know any more than you know. You can speculate. If somebody asked me my personal opinions on every single case I had, I don't think I'd ever get another case. The role of the defender in a criminal case is not guilt or innocence.
People mistake that.