I am currently reading this book by Walter Mosley. It’s about an NYPD officer who was framed, but charges were later dropped and now working as a P.I. Years later, he received a letter from the person who have him arrested to confess the frameup. At the same time working on a case dealing with a man sentence on a crime he may not have committed. I will say that the story is really good and update you on my final review.