I read the Wikipedia summary of the coup fallout. It seems Prigozhin was cooperative to turn all legit businesses and paramilitary equipment over to Putin. His former media outlets turned on him and painted him as a traitor, but he still cooperated. I feel it’s unlikely to be a mutual plot to fake his death, they’ve executed other people for far less than a public coup though. He may have thought he was getting some kind of lieniency, but I think they’re toast.