I remember having read an article by David Kahn about it. It was in a book called “what if…” edited by Robert Cowley.
Unfortunately I can’t seem to remember anything about the content of this article. I see if I find this book somewhere in my house…
I always like reading stories like that, about guys who “seem” to lead normal lives but have some incredible histories/back stories. It’s also sad to hear about their deaths too, as they are a dying breed.