GUANTANAMO BAY NAVAL BASE, Cuba — The conviction of Osama bin Laden’s driver by an American military court after a 10-day trial provides an indication of what to expect as dozens more Guantanamo prisoners go to court: shifting charges, secret testimony — and quick verdicts.

Salim Hamdan held his head in his hands and wept yesterday as the six-member military jury declared the Yemeni guilty of aiding terrorism, which could bring a maximum life sentence. But in a split decision, the jury in America’s first war-crimes trial since the aftermath of World War II cleared Hamdan of two charges of conspiracy.

A deputy White House spokesman, Tony Fratto, applauded what he called “a fair trial” and said prosecutors will now proceed with other war crimes trials at the isolated American military base in southeast Cuba. Prosecutors intend to try about 80 Guantanamo detainees for war crimes, including 19 already charged.

But defense lawyers said their client’s rights were denied by an unfair process, hastily patched together after the Supreme Court rulings that previous tribunal systems violated American and international law.

Under the military commission, Hamdan did not have all the rights normally accorded either by American civilian or military courts. The judge allowed secret testimony and hearsay evidence. Hamdan was not judged by a jury of his peers and he received no Miranda warning about his rights.

Hamdan’s attorneys said interrogations at the center of the government’s case were tainted by coercive tactics, including sleep deprivation and solitary confinement.

All that is in contrast to the courts-martial used to prosecute American troops in Iraq and Vietnam, which accorded defendants more rights.

“This outcome was predetermined — not by the court, but by the government — well before the trial even began,” Sahr Muhammed Ally of Human Rights First, who has observed hearings in the hilltop courtroom, said.

The five-man, one-woman jury convicted Hamdan on five counts of supporting terrorism, accepting the prosecution argument that Hamdan aided terrorism by becoming a member of al-Qaida at Afghanistan and serving as Mr. bin Laden’s armed bodyguard and driver while knowing that the al-Qaida leader was plotting attacks against America.

But he was found not guilty on three other counts alleging he knew that his work would be used for terrorism and that he provided surface-to-air missiles to al-Qaida.

He also was cleared of two charges of conspiracy alleging he was part of the al-Qaida effort to attack America — the most serious charges, according to the deputy chief defense counsel, Michael Berrigan.

Mr. Berrigan noted the conspiracy charges were the only ones Hamdan originally faced when his case prompted the Supreme Court to halt the tribunals. Prosecutors added the new charges after the Bush administration rewrote the rules.

“The problem is the law was specifically written after the fact to target Mr. Hamdan,” one of Hamdan’s civilian lawyers, Charles Swift, said.

The verdict will be appealed automatically to a special military appeals court in Washington. Hamdan can then appeal to American civilian courts as well.

An American Civil Liberties Union attorney, Ben Wizner, said the appeals from Hamdan’s case are unlikely to slow the pace of other Guantanamo trials.

The jury reconvened for a sentencing hearing in which a psychologist, Emily Keram, testified that Hamdan was orphaned by the age of 10, has only a fourth-grade education and worked for Mr. bin Laden because he felt it was the only way to support his family.

She said Hamdan, who is about 37, wept when prosecutors showed video of airplanes crashing into the twin towers on Sept. 11, 2001.

“He told me it was hard on his soul,” Ms. Keram testified at the hearing, which was to continue today.

Hamdan’s lawyers said he is likely to testify himself today or provide a written statement seeking leniency.

The military judge, Navy Captain Keith Allred, gave Hamdan five years of credit toward his sentence for the time he has served at Guantanamo Bay since the Pentagon decided to charge him.

The Pentagon describes the Hamdan proceedings as the first “contested” American military war crimes trial since World War II. In March 2007, Australian David Hicks reached a plea agreement that sent him home to serve a nine-month prison sentence in what the military considers the first trial.

America now holds about 265 prisoners at Guantanamo. America has been struggling to persuade other countries to take in the detainees it doesn’t plan to prosecute, including many already cleared for release and dozens who officials consider too dangerous to let loose, even if they don’t want to put them on trial.

Senator McCain, said the split verdict proved the trial was fair.

“The fact that the jury did not find Hamdan guilty of all of the charges brought against him demonstrates that the jury weighed the evidence carefully,” Mr. McCain said.

Senator Obama, also praised the military officers involved but said the process has “dangerous flaws” and that such trials belong in traditional military or civilian courts.

Hamdan was captured at a roadblock in southern Afghanistan in November 2001 and taken to Guantanamo Bay in May 2002.

The military accused him of transporting missiles for al-Qaida and helping Mr. bin Laden escape American retribution following the Sept. 11 attacks by serving as his driver. Defense attorneys said he was merely a low-level bin Laden employee, a minor member of a motor pool who earned about $200 a month.

A former Guantanamo official, Army Lieutenant Colonel Stephen Abraham, who has since become critical of the legal process, mocked the choice of Hamdan for the tribunal’s first trial.

“We can only trust that the next subjects … will include cooks, tailors, and cobblers without whose support terrorist leaders would be left unfed, unclothed, and unshod, and therefore rendered incapable of planning or executing their attacks,” Colonel Abraham said in an e-mail to The Associated Press.