Security footage from the facility shows the man was indeed held there. Angel Perez, now 33, claims several Chicago PD officers seized him, took him to a sparsely furnished room and bent him over a bench, according to a report by the Guardian. He said the room smelled of urine and recalled seeing bloodstains. One of the officers first ran a metal object along his back and then allegedly jammed it up his rectum. Perez believes it was a handgun. "He jammed it in there and I started jerking and going all crazy – I think I kicked him – and I just go into a full-blown panic attack," Perez told news outlet. "The damage it caused, it pretty much swole [sic] my rear end like a baboon's butt."

Angel Perez is the 13th former prisoner held at Homan Square interviewed by The Guardian for the paper's ongoing series of exposes about the site. Most of them have been poor and predominantly black or Hispanic. Chicago police have steadfastly denied both the alleged abuses and description of the facility as a secret torture site. A statement on the most recent allegations is expected on Friday.