IMO, he staged his suicide to look like a boating accident.
Why? I don't think his family needs money. They aren't disputing that it's a suicide.
He wanted his family to think he died in an accident.
He sits on the side of the boat with an anchor loosely attached to the boat via rope. He shoots himself in the head and falls backward in the water pulling the rope free.
Again, why the overkill? (no pun intended) Why the need to go into the water?
He wanted his family to think he died in an accident.
Bodies decompose and release the rope and anchor (see Lacy Peterson).
That's my point, the body would surface, but be beyond recognition.
DNA makes your point moot.
Again, he wanted to die but was ashamed to commit suicide. Thus, he set up an 'accident".
Was a DNA test done?
He shot himself and tied an anchor to his ankles doesn't add up to an accident or suicide.
He may have wanted to spare his family the trauma of finding damaged body. I know people who have been traumatized for life due to discovering a loved one that had committed suicide.