According to Detroit News,
Every Pacers player was allowed to leave the building. They host Orlando Saturday. There was talk that Pacers forward Jermaine O’Neal might be arrested. He and teammate Anthony Johnson both punched a fan — whose name was believed to be Charles Hadad — who had run onto the court after O’Neal. Johnson hit him first, O’Neal knocked him cold.
. . .
Hadad was carted off on a stretcher.
Detroit News is wrong — it was Artest who hit this Charles Haddad, and then O’Neal comes in and hits him again.
Sorry, but the fan got exactly what he deserved. He was clearly looking for a fight, and both Artest and O’Neal were more than in their rights to take action against the fan.
Source:
Brawl ends Pacers-Pistons game at The Palace. Chris McCosky, Detroit News, November 19, 2004.