I'm stupefied that all this happened a few years ago and I don't remember hearing anything about it. (Leading me to wonder how much is getting lost in the vortex of awful that are our daily digital lives.)
It's best to watch this knowing as little as possible, and then you too can sit there agog as I did, mouth agape, as the three hour-long episodes unfolded with so many WTF moments that kept me engrossed until the very last frame. It was sad, thought-provoking, shocking, infuriating, and the most interesting thing I watched over the long holiday period. I definitely recommend this if you haven't already seen it.