Still alive?
There's a chance this guy is still alive.
His intense interest in the mysterious life of Howard Hughes alone is enough to cause wonder. That he purportedly enjoyed the drama of complex legal battles is another. That he was seemingly detached from even blood relatives like his own mother lends credibility to the idea that he wouldn't necessarily have provided for potential offspring in his will.
The guy had stashes of money in various forms all over SE Asia. He could have easily set aside $10-20 million (or much more) and disappeared to wherever he wanted and lived comfortably for the rest of his life. This guy was (is?) an evil genius.
I'd be really surprised if Hollywood wasn't working on a big feature film version of this story. I could see Casey Affleck playing him.