A month later another whistleblower who was in good health dies suddenly and unexpectedly.
I don't think it's surprising to think that this combination of events is extremely unlikely.
I mean if I had dedicated my life to taking Boeing down and was contemplating suicide, I'd consider saying that too.
And especially you wouldn't cover up your suicide. You wouldn't want to lie to your family about the cause of your dead just to get back at some company you worked for.
I don't think this is a good theory. I don't see the logic in that. Much more logical if he was assassinated because he was spreading info that people with big money didn't want out.