Murder Out of Bounds

Twenty-six years ago David Carver's jewellery shop was robbed and his wife murdered. The robbers took him hostage in his own boat and threw him over the side to drown. He survived but the police failed to find either the men responsible, the jewels or David's boar.
Twenty-six years later his boat is found by two divers and the discovery of two bodies on the boat throws his version of events into doubt.
Can the murder of a private investigator found on a golf course near David's new home shine new light on an old case?