Was Cambodia’s US$300m Khmer Rouge tribunal worth it?

After spending nine years and more than US$300 million to prosecute the leaders of Cambodia’s Khmer Rouge responsible for the deaths of 1.7 million of their countrymen, a United Nations-assisted tribunal has ended up convicting only three people for the communist group’s heinous actions.
Was it worth it?
These kinds of proceedings do not run cheap. The longer-running tribunals covering genocide in Rwanda and war crimes in the former Yugoslavia ran up costs of as much as US$2 billion…