Footage captured as Syrians investigated the notorious Sednaya prison gives a behind-the-scenes look at conditions in what’s been described as a “human slaughterhouse”.Suleiman Fhd Moussa captured this footage on December 10. It shows dark rooms with peeling paint and scratches on the walls.The White Helmets searched for prisoners rumored to be trapped in underground cells; however, they said they “did not uncover any unopened or hidden areas.”Thousands of people had arrived at the prison in hopes of finding information about their detained loved ones, local reporters said. Credit: Suleiman Fhd Moussa via Storyful