Just found this article, its not much but it mentions that Tyson was supposed to be on the same card as Holy/Bowe. Was he actually present at the fight at all? http://www.nytimes.com/1995/11/02/s...happy-being-the-only-show-in-town.html?src=pm
They were supposed to fight on different PPV stations on the same day in different arenas, not on the same card. And I don't think Tyson was there. He would have been spotted somehow.
He was supposed to fight Mathis at the MGM Grand on free FOX TV on the same day of Bowe-Holyfield III at Caesars Palace. If the fight came off, the HBO guys wanted to make sure that their fight came after the free Tyson fight: http://sportsillustrated.cnn.com/vault/article/magazine/MAG1007382/2/index.htm