Thanks for that article, which does sound reliable about the pilot and who the passengers were and what they were doing there. Has the autopsy information been released?
No autopsy report yet. As I mentioned in another post, it typically takes 30-45 days to complete an autopsy. The initial exam is just the beginning - then there are lab tests, radiology reviews, investigation into the deceased’s medical history, etc. The NTSB investigation of the cause of the crash could take a year to complete.
Frankly, the conspiracy angle is rather far-fetched. You have to believe that someone arranged to have the plane’s engine blow and then also did something - poison Fuddy? - to make sure that she died afterwards if the crash didn’t kill her. There are much easier ways to murder someone.
Her letting go of Yamamoto’s hand is entirely consistent with her having suffered a massive heart attack while in the water. He said that he was trying to calm her down, and her heart was probably racing at 200 beats per minute during the crash and its aftermath. She may also have sustained internal injuries, but we won’t know about that until the autopsy report is released.