Khmer Rouge Officer Describes Torture.  Khmer Rouge Officer
Describes Torture  Phnom Penh. The former Khmer Rouge prison
chief told Cambodia's UN-backed war crimes court on Monday that
some inmates had blood completely drained from their bodies or
were used for medical experiments.  Kaing Guek Eav, better known
as Duch, was answering judges' questions about conditions at
Tuol Sleng prison, where he supervised the torture and
extermination of up to 15,000 people.  "First, live prisoners
were used for surgical study and training; second, blood drawing
was also done," Duch told the court.  The testimony represented
a new admission of guilt for Duch, who previously said he knew
nothing of blood draining.  In the morning of one of the most
dramatic days so far in his crimes against humanity trial, Duch
at one point became visibly distraught while talking about which
prisoners were tortured. Judges gave him some time to compose
himself.  Duch also told the court that Khmer Rouge leader Pol
Pot knew prisoners' confe