I'm no expert on him, but my personal belief is that he was poisoned over a long period, possibly with mercury or some drug, so he'd be manageable by handlers. He supposedly had ties to the CIA. Also, strangely enough, he was knee deep in Mormons towards the end of his life. One-sixteenth of his fortune was left to the Mormon Church. There's an old NYT article from 1976 that chronicles oddities surrounding his death two weeks prior. Hughes' life and death is an interesting rabbit hole that leads to more questions than answers unfortunately.
Edit: all of the wills presented after his death were forgeries, and Hughes' estate wasn't settled until 2010. There were also rumours that he faked his own death.
I'm no expert on him, but my personal belief is that he was poisoned over a long period, possibly with mercury or some drug, so he'd be manageable by handlers. He supposedly had ties to the CIA. Also, strangely enough, he was knee deep in Mormons towards the end of his life. One-sixteenth of his fortune was left to the Mormon Church. There's an old NYT article from 1976 that chronicles oddities surrounding his death two weeks prior. Hughes' life and death is an interesting rabbit hole that leads to more questions than answers unfortunately.