I’d be open to the idea that his partner was murdered by some scorned investors, but the boat capsizing during a sudden a storm, in large part because it’s dipshit owner wanted to brag about having the world’s largest mast…well that would be a stretch even for Jason Bourne.
However, I would absolutely believe that there was a hit man waiting for him to return to shore, who had to explain to his client that there’s no refunds just because God killed him first.