I completely don't believe there were any racial slurs stated by the ref. I think that's a complete smoke screen, an attempt to justify attacking him.
Here's what's come out on radio, and in the news:
Early in the game, 2 players were ejected for trash talking the other team. One of the players was John Jay's star player. They began to lose the game. The assistant coach then said that ref "needs to pay for cheating us", an apparent reference to kicking out the player that would have probably led John Jay to a win. The two tackled the ref, and then the ref ejected one of the tacklers, and accidentally ejected the wrong guy that he thought had headbutted him with the helmet, leaving the truly guilty player still in the game. With one more play to go, the last play of the game, the one guilty of head butting the ref took a late hit on Marble Falls QB , in an illegal tackle that is illegal because it can ruin a player's knees forever. Thankfully, the QB was not injured as intended. Even though the game was over at that point, the ref took the sanction of ejecting that player for the assaultive late hit.
This is all over the news here, all the statements in my summary have been in MSM. I hope the assistant coach and the 2 players are charged with crimes, the coach and two players never are allowed near UIL football again, and the ref is successful in lawsuits against those who have libeled and slandered him.
The game was played in Marble Falls, so it's up to LE and Marble Falls prosecutors to decide whether to press charges, and it sounds like as of yesterday they were headed to criminal court.
http://usatodayhss.com/2015/assistant-coach-john-jay-marble-falls-targeting-referee