Chicago police have reportedly operated a secret compound for detentions and interrogations, often with abusive methods. According to The Guardian, detainees as young as 15 years old have been taken to a nondescript warehouse known as Homan Square. Some are calling it the domestic equivalent of a CIA “black site” overseas. Prisoners were denied access to their attorneys, beaten, and held for up to 24 hours without any official record of their detention. Brian Jacob Church, who was arrested during Chicago’s 2012 anti-NATO protests, said he was shackled to a bench for 17 hours without being read his Miranda rights.

Brian Jacob Church: “When they first arrested us, they took us to this building. We were never booked. We were never processed. I was in Homan Square for about 17 hours, handcuffed to a bench, before I was actually finally allowed to see an attorney.”

At least one victim was found unresponsive in an interrogation room and later pronounced dead. The Guardian says the detainees brought to the Homan site “are most often poor, black and brown.” Two former senior officials in the Justice Department’s Civil Rights Division have called on their colleagues to launch a probe.