I'm watching "The Look of Silence" right now. Not a word of it is in English but it is the most intense documentary I've ever seen. It is essentially the story of a man confronting people who killed his brother in 1968 in the Indonesian genocide. These men are of course very old now but they aren't remorseful at all and very sociopathic and dangerous. I think they're going to kill this man before this doc ends.
It lost the Academy Award for best documentary to Amy, this is much much much better than Amy.