The DJ should be investigated and indicted for incitement. Find out who his unnamed backers are.
Iirc he was fraudulently promising pool access for $15 cash. So the HOA has a good civil case against him as well.
This article claims that he was only DJing at a concert “near” the pool, not FOR a pool party (with his gear located outside of the perimeter).
Anyone see a map of the pool and DJ location yet?