“Fox News just reported that the LA Times just reported that one of the shooters had been in a meeting with the victims. Got in a heated argument, left, came back with the other two.”
Sounds like gang stuff.
If this was just a party for Health Department employees, could be gangsters who were there.
Sure. Narcotics theft from the inside... blackmail, threats— it could all be true and part of this. And also how one guy could go get his distro “team” to come back and shoot them up.
Or a combo of both islamo thugs and druggies of asian hispano background. Lot of possibles.