What is the basis of the claim? Describe the complaint. Kevin Ollie seeks damages because....? Because the NCAA relied on evidence from a guy who may have said something else that they didn’t rely upon, which was untrue? That’s not a tort as far as I know. Oh and they relied upon other information that didn’t come from Miller at all. Most of which we know to be true. And Ollie’s damages, such as they are, come from being fired, which again was based on violations that did happen and which are corroborated by more than Miller.
It’s silly to even suggest that he could sue the NCAA for investigating things they are supposed to investigate and issuing findings as to who it thinks violated rules it wrote. Unless you or he thinks that the NCAA itself made all this up, and fabricated everything with the intent to cause harm to KO. Is that the claim?