Duch was given a commuted sentence of 19 years for his role in the torture and execution of more than 12,000 people.
The fresh accusations of corruption came after the tax collection department of the Ministry of Finance issued a notice last week.
An estimated 2 million people, or a quarter of the population, perished under the regime.
Nearly 1,000 people died on the roads in the first six months of 2010.
With the verdict of Duch passed and the court now looking at its second case, some victims have not been satisfied.
The meeting in Lowell, Mass., will be an opportunity for the Cambodian community to get an update on complaints they filed to the court.
Former Khmer Rouge cadres contacted by VOA Khmer claimed the recent Duch's verdict had not caused concern in former Khmer Rouge areas.
Cambodia and Thailand have indefinitely postponed an annual border meeting in the midst of an ongoing row over Preah Vihear temple.
The Preah Vihear province research organization, ADASP, is directed by a powerful businessman and two-star general named Pen Lim.
The book was handed out at Tuol Sleng, which is now a museum, the mass grave site of Choeung Ek, and in Phnom Penh's Prey Sar commune.
Other court observers say the government lacks the political will to reform the judiciary or overcome Cambodia's culture of impunity.
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