And the Sea Will Tell: Murder on a Desert Island and Justice by Vincent Bugliosi and Bruce Henderson
I was living in Hawaii when I heard the story about a couple from San Diego named Mac and Muff Graham who had sailed out of the Ala Wai Canal to Palmyra Atoll, about 1000 miles due south. Their ketch, the Seawind, showed up several months later back at the Ala Wai with a new name and new paint, and a different crew.
The new crew was arrested for the murder of the Grahams. Vincent Bugliosi and Bruce Henderson tell the story. This is a book about the trial. If you like that kind of read this is a good one, with sailing and a tropical atoll as focal points.