Nuon Chea
"Nuon Chea was a Cambodian communist politician and revolutionary who was the chief ideologist of the Khmer Rouge. He also briefly served as acting Prime Minister of Democratic Kampuchea. He was commonly known as "Brother Number Two" as he was second-in-command to Khmer Rouge leader Pol Pot, General Secretary of the Party, during the Cambodian genocide of 1975–1979. In 2014, Nuon Chea received a life sentence for crimes against humanity, alongside another top-tier Khmer Rouge leader, Khieu Samphan, and a further trial convicted him of genocide in 2018. These life sentences were merged into a single life sentence by the Trial Chamber on 16 November 2018. He died while serving his sentence in 2019."1
I just can't believe that given the much larger articles of other architects of atrocities, that those of the Khmer Rouge get such short ones. When he's a top guy responsible for 1.5 to 2 million deaths, I think there should be more details about his involvement. Seems fishy there is so little.
1: https://en.wikipedia.org/wiki/Nuon_Chea
https://en.wikipedia.org/wiki/Cambodian_genocide