Former opposition party leader Kem Sokha is appealing his 27-year sentence for treason in Cambodia’s Court of Appeal. One human rights group is calling for his immediate release, stating that his sentence is baseless. Security was tight at the courthouse, with reporters barred from entering. Sokha was arrested in 2017 and charged with colluding with a foreign power. He spent a year in prison before being transferred to house arrest. Amnesty International has demanded his release, criticizing the Cambodian authorities’ disregard for human rights. Sokha denies the charges, which relate to a video recorded in 2013 discussing a strategy to win power.