This is the second day of hearings for Duch, who was tried in 2009 in the first test of the UN-backed court.
Duch, the former Tuol Sleng chief's sentence was reduced to 19 years because of time served and other factors.
Duch, was found guilty by the Trial Chamber of atrocity crimes that included crimes against humanity.
In their decision Thursday, the Trial Chamber said the motion lacked evidence and reasoning.
Defense lawyers have already requested shorter days for hearings, claiming the defendants are old and cannot sit through full days.
Three former survivors of Tuol Sleng prison, are anxiously awaiting a final hearing on its chief administrator, Duch, later this month.
Tribunal prosecutors are now seeking a full 45 years imprisonment for the former prison chief, Duch.
Cambodian-Americans in San Jose, Calif., met this past weekend to discuss possible reparations the tribunal court might undertake.
The “Voices of the Khmer Rouge” exhibit contains 30 lengthy interviews with former Khmer Rouge now living in pockets along the Thai bord
There are 170 Cambodian-Americans filing with the help of the institute as both complainants and civil parties.
Court officials are expected to discuss internal rules for the tribunal over the next three days that will help it bring Case 002 to tri
Defense lawyers have argued their clients have been held beyond the mandated limits of pre-trial detention.