The lawyer spearheading a case to have Prime Minister HE’s eldest son, HM, and the Cambodian government tried in the U.S. for wrongful imprisonment said on Tuesday that a subpoena had been officially served, and claimed the case could move forward within a month.

Meach Sovannara, a CNRP official and U.S. citizen, was jailed last year for insurrection due to his presence at a 2014 protest that devolved into a brawl. He is suing Lieutenant General Manet and the government for damages resulting from “torture through arbitrary, extra-legal and long-term detention.”...

Mr. Sklar said he believed his latest suit was valid due to an exception contained within the U.S. Foreign Sovereign Immunities Act.

“The provision says that where a foreign government has committed a tort in a foreign country that has impacts in the U.S. that act constitutes an exception to the principle of foreign sovereign immunities and allows the government to be sued,” he said...