There’s a very interesting article in Foreign Policy on a man called Patrick Ball who uses statistics as a human rights tool.

Could the movements of refugees have been random? No, Ball said. He had also plotted killings of Kosovars and found that both phenomena occurred at the same times and in the same places — flight and death, hand in hand. “I remember well the moment of astonishment that I felt when I saw the killing graph for the first time,” Ball replied to Milosevic. “I assumed I had made an error, because the correlation was so close.”

The article doesn’t just describe Ball’s conclusions – it goes into a good amount of detail about the methods he uses, and the dangers of misinterpreting non-representative data.