Moran suggested Liotta could be held in contempt of Congress, threatened to cut funding for the Office of Detainee Policy unless he got satisfactory answers, and said he thought Liotta ought to be fired.
"To take up two hours of our time and not directly answer any of the relevant questions – is an absolute insult to the United States Congress," Moran declared.
"I understand that this is a difficult moment for you," panel chairman Rep. Bill Delahunt, D-MA, told Liotta after Moran finished. "I have no doubt that you have received instructions. . . You find yourself in a very awkward situation."
The last Uighurs in Guantanamo were released last month to Bermuda and Palau, after being held at the island prison for over five years. Former senior State Department official Randall G. Shriver, who worked on the issue until 2005, recently called the men's detention "nothing short of tragic."
In addition to allegedly allowing Chinese intelligence personnel to interrogate the Uighur prisoners, U.S. officials allegedly shared with the Chinese private data on the identity of the Uighur detainees' family members; helped "soften up" the detainees by keeping them awake and other measures; and allegedly helped restrain the detainees when asked to do so.
"I had never thought that American soldiers would work with Chinese and treat us like this," wrote Abu Bakker Qassim, a Uighur ex-detainee who provided testimony, through his lawyer, to the committee. Qassim, who applied for political asylum in the United States, now lives in Albania.
"After the Chinese had left, during an interrogation, I asked [U.S.] interrogators why they released all of out materials to the Chinese even though they promised to keep our information confidential; the Chinese could now randomly oppress our family members," Qassim wrote. "They apologized by saying that someone in Washington gave our materials to the Chinese."
The State Department has found China has suppressed Uighurs' religious freedoms, and has accused the Chinese government of persecuting, even executing, those who advocate Uighur independence. Clashes this week in western China involving Uighurs have claimed nearly 200 lives, according to the Chinese government, although Uighurs say their fatalities are higher than counted by the state.
This story has been revised.