You need to read this book or watch the documentary.
http://www.amazon.co.uk/exec/obidos/...985320-2001203
Not only did the producer spend years painfully researching and writing before making the documentary but he also tried to show both sides of the story. To ask the guards why they did, what they thought etc. etc. Mixed with the real life stories are photographs and real film footage.
If anything it makes you think and realise it isn't just stories. People really did live and die in horrific circumstances. We will probably never know exactly how many.