ABC -- ‘Definitely a Cover-Up’

Dozens of soldiers — other than the seven military police reservists who have been charged — were involved in the abuse at Iraq's Abu Ghraib prison, and there is an effort under way in the Army to hide it, a key witness in the investigation told ABCNEWS.

"There's definitely a cover-up," the witness, Sgt. Samuel Provance, said. "People are either telling themselves or being told to be quiet."

Provance, 30, was part of the 302nd Military Intelligence Battalion stationed at Abu Ghraib last September. He spoke to ABCNEWS despite orders from his commanders not to.

"What I was surprised at was the silence," said Provance. "The collective silence by so many people that had to be involved, that had to have seen something or heard something."

He said that while he did not see the actual abuse take place, the interrogators with whom he worked freely admitted they directed the MPs' rough treatment of prisoners.

"Anything [the MPs] were to do legally or otherwise, they were to take those commands from the interrogators," he said.

According to Provance, some of the physical abuse that took place at Abu Ghraib included U.S. soldiers "striking [prisoners] on the neck area somewhere and the person being knocked out. Then [the soldier] would go to the next detainee, who would be very fearful and voicing their fear, and the MP would calm him down and say, 'We're not going to do that. It's OK. Everything's fine,' and then do the exact same thing to him."

Provance also described an incident when two drunken interrogators took a female Iraqi prisoner from her cell in the middle of the night and stripped her naked to the waist. The men were later restrained by another MP.

Maj. Gen. George Fay, the Army's deputy chief of staff for intelligence, was assigned by the Pentagon to investigate the role of military intelligence in the abuse at the Iraq prison.

Fay started his probe on April 23, but Provance said when Fay interviewed him, the general seemed interested only in the military police, not the interrogators, and seemed to discourage him from testifying.