Guantanamo Bay, Cuba — Navy Captain John Murphy, the chief military prosecutor at Guantanamo Bay, announced today that military prosecutors were ready to proceed with cases against 66 of the more than 220 security detainees held at the naval facility in Guantanamo Bay.

Speaking to more than two dozen reporters at Guantanamo, Murphy said that he was "personally comfortable" that the government could mount a case that would not depend on evidence gathered through the use of coercion.

"We have 66 viable cases," Captain Murphy said. The chief military prosecutor went on to say that he "would not draw timelines" regarding what evidence would and would not be used. Reporters raised questions suggesting that any evidence obtained after abusive techniques were employed could be considered tainted. Captain Murphy declined to answer these questions.

Independent observers said they were concerned that the prosecutor’s office would be making decisions about what evidence was appropriate and what evidence was not appropriate to use without any independent review.

"They say repeatedly that they are not going to rely on evidence that was obtained using coercion," said Vic Hansen, a former Army Judge Advocate General officer who is observing this week’s proceedings for the National Institute of Military Justice. "Well, it’s the prosecution who is making that call alone without any transparency."

Captain Murphy said that the prosecution had developed "a standard" to ensure that no evidence obtained improperly would be used in the trials. But he declined to elaborate on that standard.

"What it comes down to is more or less the government saying, ‘just trust us,’" said Hansen.

David Danzig is the Deputy Program Director at Human Rights First. He is observing proceedings against security detainees held at Guantanamo Bay.