I always thought there was problem with the plotline onvolving the diver.

The plane supposedly crashed way out in the ocean. Are we to believe a diver/assassin somehow was near enough the crash site to swim over in a few minutes? If he came off a boat, wasn't the boat close enough for the passengers to wave it over? And if it refused to assist, wouldn't they have said that? Similar issues arise if you suppose he came off the shore, which was a couple of miles away.

The questions continue, but the other odd fact is that there happened to be GoPro video of the entire flight beginning with the takeoff. What a coincidence, right?

The entire affair makes me think that the event was faked, the main purpose being that Fuddy, a loyal retainer, would not be available to tell any tales. Then the rest of it, like the JFK assassination, is where they purposely heap conspiratorial wood on the fire to keep researchers staring at the dancing flames as long as they care to without ever approaching the truth.