The allegations, if true, might well have cost him his star, and seen him retired as an O6, if they came to light while he was retired. But taking his star after he retired? I expect memoirs to be a lot less candid if this is a thing for retired service members who haven’t committed the crime of being on good terms with Donald Trump.
No, I can’t recall that ever happening. Nor, frankly, what the mechanism might need for doing so. And I sat second chair to Mike Murphy my first 3 courts martial as a prosecutor and was as disappointed as anybody at his deception.