Simpson, who died on April 10 at age 76 from cancer, was originally set to publish his book, 'If I Did It: Confessions of the Killer,' in 2006. The book gives a hypothetical account of how he would have killed ex-wife Nicole Brown Simpson and her friend Ron Goldman.
https://people.com/the-story-of-oj-simpsons-book-if-i-did-it-8630142