We had two threads about this story:
BYU bans fan for racial slur
University of South Carolina cancels games with BYU amid alleged racist slur incident with Duke
It seems like the original story got a lot of press coverage.
It looks like there are articles coming out claiming that the story is a fabrication. See, e.g., here:
And here:
The above link ("was") goes to this article: Police Find No Evidence BYU Volleyball Fan Yelled ‘N-Word’ During Game
And