The United Nations must address a “crisis of confidence” at the beleaguered Khmer Rouge war crimes tribunal in Cambodia following the resignation of a controversial judge, critics say.

News this week that Siegfried Blunk, one of two investigating judges at the UN-backed tribunal, resigned citing political interference is raising questions about the legacy of the court itself.

Critics say the high-profile departure shows significant moves must be taken to ensure the integrity of the tribunal, known officially as the Extraordinary Chambers in the Courts of Cambodia, or ECCC.

"The court is already seen as compromised," one observer says. 

A news analysis piece.