The first day of Kem Sokha's trial hearing ended Wednesday evening, with the former opposition leader facing questions about his early political career, the founding of a human rights group and its funding by global donors, especially USAID.
Kem Sokha is accused of plotting to overthrow Hun Sen, who has been in power for 35 years.
"And this is not just the trial of Kem Sokha".
Kem Sokha was arrested in 2017 and his opposition Cambodia National Rescue Party was banned ahead of a 2018 election in which the party of Hun Sen won all the parliamentary seats.
Thomico said that the outcome of the trial won't have anything to do with justice. "All charges must be dropped", she said.
The case is widely seen as politically motivated and the daughter of Kem Sokha has called the trial against her father a "farce".
Tech said Sokha's case of conspiracy with a foreign power involved nine countries, certain NGOs and foreign individuals. If convicted, Sokha faces up to 30 years in jail.
The EU is considering whether to suspend preferential duties on exports from the country. "He said the video played in court had been edited", Tech said.
In September 2017, armed police raided Mr Sokha's home and he was accused of plotting to start a US-backed revolution. He maintains his innocence and his lawyers have said that prosecutors lack evidence to convict.
He was released in November past year but barred from leaving the country and engaging in politics.
Following Wednesday's proceedings, Kem Sokha posted a message to his Facebook account in which he said he "categorically den [ies] the charge of "conspiracy with foreign powers" which was brought against me".
"I did NOT bring in foreign states or foreign agents to conduct hostility or invasion against Cambodia", said the statement on Facebook.
"All of my activities were focused on human rights and democracy, carried out in peaceful and non-violent manners in accordance with the Constitution of the Kingdom of Cambodia", he wrote, adding that his political activities "were focused on the participation in free, fair, and just elections that truly reflect the will of the Cambodian people". "At other courts people can watch the developments on a big screen".
Rights groups have decried the case. "I want to see what evidence they show".
Rong Chhun, a union leader and former member of Cambodia's National Election Commission (NEC), told RFA he had traveled to the courthouse on Wednesday to monitor the trial but was forced to stand outside.
The press awaits the arrival of Supreme Court-dissolved CNRP president Kem Sokha at Phnom Penh Municipal Court on Wednesday. He denies the charges, saying they are politically motivated. Kem Sokha is the figurehead of democracy in Cambodia. "We don't need the King [Norodom Sihamoni] to pardon him".
Pheng Heng said he and his legal team requested to use the full version of the speech - around which the charges against Kem Sokha centre - instead of an abbreviated, two-minute version the courts had so far shown.
"Now it's been more than three years and she is still in prison".
"We hope that he will be acquitted if the court has any interest at all in starting to demonstrate its independence", said Monovithya Kem according to Reuters.
It has not been announced when a verdict is expected, though news reports suggested the hearings would last three months.
Meng Sopheary, Kem Sokha's lawyer, said the opposition leader was asked his early political career in parliament and his decision to start the Cambodian Center for Human Rights (CCHR), which he headed from 2002 to 2007. Written in English by Joshua Lipes.
Reported by RFA's Khmer Service.