Convicts cleaning house.
They might be cleaning house, but more likely, just normal Norteno/Sureno gang action. 60 some years of fighting, over a disrespect incident. Maybe many of them, probably don’t even know what they are fighting about anymore, but it’s been going on for many decades.
Many times, it’s the women on the outside, who get the news to the chumps in the other joints, so retaliation attacks, happen rather quickly