The Khmer Rouge commander known as "Comrade Duch," former Prime Minister Pol Pot's premier executioner and security chief who oversaw the mass murder of at least 14,000 Cambodians at the notorious Tuol Sleng prison, has died. Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en