Two other men involved in the plot to assassinate Ko Ni receive jail terms, while a fifth remains at large.
Short on supplies during the winter months, hungry recruits break into homes and farms near bases.
A group of independent Chinese students calls on governments and universities to act, after threats to ethnic minority activists outside China.
He says he will refuse arrest on his return, calling instead for the Cambodian people to remove the long-ruling prime minister and 'bring him to justice.'
