This sheriff needs to be removed from his position for dereliction of duty.
400 every 10 days will be 2500 in two months. Someone high profile will be a crime victim, and the elected bozo will ride a rail out of town.
It's not just dereliction. Since they were under arrest for federal, state or local charges, he can't just release bunches of them at a time without being complicit in their crimes including illegal presence, but also the crimes they were arrested for.
Foreseeably thousands of lawsuits from every conceivable direction, not to mention accessory after the fact, and of course, treason. He must have some great protection via the cartels and/or “deep state.”