Khieu Samphan, 90, was sentenced in 2018 by a UN-backed court to life in prison for genocide.
Court hands maximum term to Rong Chhun who was arrested after raising concerns about land rights on the eastern border.
Rong Chhun is accused of ‘incitement’ and faces up to two years in prison if convicted.
Khieu Samphan is one of only three people convicted in relation to the government’s brutal four years in power.
Almost a third of alleged abuses took place in Southeast Asia, including Myanmar, Laos, Cambodia and Indonesia.
Karaoke lounges, bars and casinos under scrutiny after cases in Southeast Asian country surge into the tens of thousands
Secretary of State Antony Blinken to attend annual meeting of ASEAN foreign ministers, among others, US official says.
Award-winning seven-year-old rodent has detected 71 landmines and 38 items of unexploded ordnance, his employers say.
Investigation finds thousands of illegal animal parts and products at markets across five countries.
Wanchalearm Satsaksit, a critic of the Thai prime minister, was abducted in Phnom Pehn in June 2020.
NGO that forced government into U-turn over controversial dam is latest target of deepening crackdown on dissent.
Tourism has helped Indigenous communities improve their lives and protect the forests. COVID-19 has put both at risk.
Government using punitive laws to tackle surge in coronavirus cases, as closure of markets leaves people hungry.
The Southeast Asian nation is battling a surge in COVID variant cases traced back to a quarantine breach.