"One of the puzzling aspects of this incident is that despite Richardson's report that the racial slurs occurred every time she served..."

"... and continued throughout the match, even becoming more threatening as the match went on, no one - not the Duke coaches, BYU coaches, BYU players, officials - called for play to stop and the heckler be ejected. Nor did the fans surrounding the heckler respond by either reporting or confronting the heckler. The only action taken, according to the original report, was that BYU stationed a police officer at the Duke player's bench, where the officer reportedly took no action. With just those facts reported, it makes pretty much everyone except the Duke players appear complicit in the heckling and racial slurs. And BYU is a pretty easy target for those kinds of allegations."

So says the "most respected" comment on "The fan who was banned by BYU does not appear to have yelled slurs at volleyball match, campus police say/University officials are asking for help with their investigation after police initially reviewed footage of game against Duke" (Salt Lake Tribune).

The commenter continues:

Now additional information is released that compounds the mystery. 

1. No one - not any of the BYU players or coaches, Duke coaches (who complained about the lack of action by BYU police, but did not report hearing the slurs), officials, the police officer standing at the Duke bench, or a single fan - has come forward to say they heard the racial slurs. Given the claim the slurs continued throughout the game, this is exceptionally unusual. 

2. To the contrary, the BYU police officer reports that he heard no racial slurs, only players being called out by name. 

3. The specific racial slur was reportedly shouted out every time Richardson served the ball. This type of act, repeated every time a unique part of the match took place (a serve) would be very notable. If Richardson could hear it, it is likely that all of the players, coaches, and officials would also be able to hear it, especially since it was predictably repeated. 

4. Despite Richardson's claim that the racial slur occurred every time she served, ushers and a police officer who were sent into the stands to try and locate the heckler were unable to do so. 

5. The [Utah Valley University] student who approached the Duke player after the game has come forward and admitted he did so, believing it was a friend. He denies making any slurs. 

6. Reviews of video of that same UVU student during the match - who the Duke coaches and players identified as also responsible for the heckling with racial slurs - have not yet been able to confirm he was doing the heckling. To the contrary, the video review shows he was not even present during the second set, and during the later sets show him playing with his phone. 

I have no particular insight into the incident, and I know nothing more than what is being reported. But having interviewed hundreds and hundreds of witnesses over my law enforcement career, and having had the opportunity to observe crowd behavior in venues such as the Salt Palace, Delta Center, and Rice Eccles stadium, there is something here that clearly doesn't add up.