Just off the side of the road in rural southern Texas is a large beige building that looks a lot like a prison. Fences and tall walls mark the outside. Inside, the doors slam and people sit in control booths at the end of long concrete hallways.
But just a little farther into the facility, the door opens to a courtyard in the center of the complex, and there, things begin to change. There's a soccer field, a pavilion and a gymnasium. There's also a walk-up pharmacy and commissary. All of it is guarded by officers in polo shirts.