S21: The Khmer Rouge Death Machine
S-21, la machine de mort Khmère rouge (original)
Documentary of the S-21 genocide prison in Phnom Penh with interviews of prisoners and guards. On the search for reasons why this could have happened.
Starring Chum Mey, Khieu 'Poev' Ches, Yeay Cheu, Nhiem Ein, Houy Him, Ta Him, Nhieb Ho, Prakk Kahn, Peng Kry, Som Meth
Watch "S21: The Khmer Rouge Death Machine" from streaming services Fandor, Fandor (Prime) released in 2003. It's a documentary and war movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie.