Lt. Gen. Chhoeun Chanthan was found guilty for breach of confidence, distribution and selling of weapons and mismanagement.
Donors are meeting in New York on Friday to review the budget proposal.
Congresswoman Tsongas met with government officials, civil society groups, business community, and opposition parties.
The court’s international side is expected to run out of funds in a few months, if more funding is not allocated.
In his confession during a hearing in March 2009, Duch said he reported to brother number two Nuon Chea, the regime’s chief ideologue.
Judge Pol Sam Oeun who heard the case in the appeal court said the verdict will be announced on 14 March.
Cambodia is scheduled to hold local commune council elections nationwide in June this year.
On Monday, three female workers were attacked by an unknown gunman while protesting for a pay raise and better working conditions.
The 27-page document released by the tribunal shows Duch expressing remorse.
The women suffered wounds from handgun shots to their arms, chest, or back.
The renovation will lead to thousands of families to be moved from their homes along the railway in the process.
Rare photos taken by American journalist Elizabeth Becker are now on display in Phnom Penh.
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