Anyone who serves time for a federal crime will end up in what prison experts say is the best-run system in the country: the Federal Bureau of Prisons. But if you’re not a U.S. citizen, you could end up in one of 11 facilities that don’t have to follow the same rules – and are run by private companies instead of the government.

This hour of Reveal investigates medical negligence in this parallel private prison system for immigrants. We also expose the shift in criminal justice policy that helped fill up these prisons.