Damn, I saw a movie about this. Called "Goodbye Uncle Tom" from Mondo Cane. This movie is outrageous, brutal but very realistic to the actual events.
This movie ain't for the fainthearted I can tell you.
I don't wanna cause any hate, but here's some screenshots from the movie.
http://deanguelo.blogs.com/photos/bl...s/uncletom.jpg
http://img528.imageshack.us/img528/6944/readfile3iq.jpg
http://img121.imageshack.us/img121/1...adfile23kg.jpg
http://img121.imageshack.us/img121/5...adfile36mm.jpg
http://img121.imageshack.us/img121/3...adfile41rd.jpg
http://img121.imageshack.us/img121/6...adfile58fh.jpg
http://img121.imageshack.us/img121/6...adfile62hz.jpg
http://img121.imageshack.us/img121/2...adfile70up.jpg