A pair of witnesses have become refugees and some members of the government critic's funeral committee have left or gone into hiding.
The move comes amid a U.S. diplomat's visit and a decision by Kem Ley murder witnesses to seek asylum.
On the opposition party's fourth anniversary, its leaders vow to stay the course even it it is personally dangerous.
Action comes as the government rejects calls for an independent investigation into the death of a popular government critic.
Oueth Ang faces life in prison if he is convicted of killing Kem Ley.
Opposition lawmakers and other government critics say they won’t be cowed by brutal slaying.
Local monks and his family identify man accused in the killing of Kem Ley, but wonder about the motive.
Shock and sorrrow as Kem Ley is gunned down in Phnom Penh amid rising political tensions.
On Facebook, Hun Sen rescinds edict requiring news outlets to use his full title.
Loyalists contend that Global Witness and the media are out to get the prime minister and his family.
Global Witness says wealthy strongman has strangled Cambodia's democracy and corrupted its legal system.
Foreign aid cuts could lead the nation back to the bad old days, NGOs and analysts warn
Despite other countries' concerns, Prime Minister Hun Sen's government keeps up the legal push.
Hun Sen dispenses with any pretense of due process, calling CNRP leader a ‘prisoner’ who will be in jail forever.
Hun Sen’s anti-opposition campaign tries to hit Cambodia National Rescue Party lawmakers in the wallet.
Civil society groups applaud the move, but want him to take responsibility for other problems in the country.
EIA finds systemic disregard for CITES safeguards designed to protect Siamese rosewood.