A former Khmer Rouge prison chief has been found guilty by Cambodia's UN-backed war crimes court, in the first international trial for atrocities committed under the late 1970s regime. Kaing Guek Eau, better known as Comrade Duch, who ran the notorious S21 prison in Phnom Penh, was sentenced to 35 years prison on Monday. He has confessed to torturing more than 12,000 people before they were sent to the killing fields for execution. It took 10 years and 100 million dollar to bring him to trail.