An al-Qaida driver who gave detailed, insider knowledge of the terror network to U.S. agents is seeing his words used against him at the first Guantanamo war crimes trial.

The first week of Salim Hamdan's trial ended Friday with the latest in a series of FBI interrogators testifying about valuable information from the defendant, a former driver for Osama bin Laden who once mingled with many of America's most wanted terror suspects.

"I don't know if I ever thanked him," said special agent George Crouch, who interrogated Hamdan in 2002.

Agents have said that Hamdan identified key terrorist leaders, mapped out bin Laden's escape routes and led them to al-Qaida safehouses after he was captured at a roadblock in southern Afghanistan in November 2001.

Hamdan's lawyers say he has been interrogated by more than 40 U.S. agents, and argue all his statements were tainted by coercive tactics including sleep deprivation and solitary confinement.

The target of the first U.S. war crimes trial since World War II, Hamdan faces a maximum life sentence if convicted of conspiracy and supporting terrorism.

Friday's court session adjourned early because Hamdan, who was treated for a fever at the prison hospital Thursday, still was not feeling well, said Navy Lt. Cmdr. Brian Mizer, his Pentagon-appointed attorney. The trial is scheduled to resume Monday.

The defense team lost a bid earlier this week to have Hamdan's statements thrown out because he was not advised of a right against providing incriminating information. But in questioning government witnesses, his lawyers have suggested to the jury of American military officers that he had no way of knowing that he was the target of a criminal investigation.

"Did anyone ever say, 'You've got to understand, somebody can use this against you?'" said Harry Schneider, one of Hamdan's lawyers, as he cross-examined Crouch. The agent said he did not remember.

Military prosecutors argue Hamdan cooperated reluctantly, and by the time he shared important information, it was of little tactical value.

The agents who testified said Hamdan was polite and generally provided reliable information, but was not necessarily forthcoming. Crouch said Hamdan, like many detainees, was often evasive.

"You want to tell the interrogator what you think they already know, and hold out on what you think they don't know," he said.

While the Pentagon chose Hamdan as one of the first detainees to face charges, some of his peers who did not cooperate with their captors have been sent home from Guantanamo.

Michael St. Ours, a Naval Criminal Investigative Service agent, said a man identified by Hamdan as bin Laden's top bodyguard, Abdellah Tabarak, refused to meet with him for interrogations. Tabarak was released to his native Morocco in 2004. Continued...