Jails are normally county run. The Sheriff usually runs them. Historically in the old west, despite many hit movies, US Marshals were very careful to keep good relations with county sheriffs as they were typically the only ones that had a jail.
Feds do not have a right to have an office in a jail.
That said, I bet this idiot sheriff has many huge federal grants. Those should all be cut off immediately. I realize a court will immediately rule that illegal, but I watched Obama ignore Federal courts for 8 years.
Is that how you "feel" about it or can you back that feeling up with some fact?