Lawyers who have followed the case said they knew of no startling, undisclosed evidence.

When the judge decides the case, any part of his opinion relating to the undisclosed evidence would be secret - kept from the defendant.

In a 7-to-2 decision, the court said that the undisclosed evidence would have allowed the defendant, Delma Banks, to discredit two of the state's most important witnesses.

"A defendant need not demonstrate that after discounting the inculpatory evidence in light of the undisclosed evidence, there would not have been enough left to convict."

The case outlined by Mr. Mackey today is broader than the case against Mr. McVeigh and includes previously undisclosed evidence.

In 1989, Mr. Mullin convinced Judge H. Lee Sarokin of the Federal District Court in Newark that the state possessed undisclosed evidence.

The person, who spoke on the condition of anonymity, said the undisclosed evidence was not DNA, and on its own would probably not be enough to convict Mr. Skakel.

Eddie Gilfoyle, who spent 18 years in prison for the murder of his wife, told Broadcasting House that previously undisclosed evidence held by the police could have led to his conviction being quashed.

Undisclosed Evidence Justice McQuillan threw out Mr. Wahad's 1973 conviction on the ground that the prosecution had failed to disclose evidence that his lawyers said would have helped him.

Prosecutors began constructing a case that includes previously undisclosed evidence and is broader than the one against Mr. McVeigh that in June led to his conviction and condemnation to death on murder and conspiracy charges.

The court directed the city to conduct a thorough investigation, which uncovered previously undisclosed evidence, much of which was in the desk or cabinet of Det. Steven Katz, the lead detective in the Wallace murder investigation.

Burden of proof does not lie with the plaintiff; instead, the Council decides whether or not the appellent has cause to bring suit and whether the government was in error if information provided by the appellent is sufficient to locate previously undisclosed evidence.

Dennis K. Lurty Jr., 26, of Pemberton, was indicted by a state grand jury on Aug. 7 on charges stemming from undisclosed evidence that prosecutors received only recently, said Rita Malley, a spokeswoman for the Attorney General's office.

The White House cannot be expected to renounce its right to call its own witnesses or to review undisclosed evidence that the House managers seek to introduce during their questioning of Ms. Lewinsky, Mr. Jordan or Mr. Blumenthal.

The discovery of thousands of pages of undisclosed evidence in the Timothy J. McVeigh case had its origins in the closing days of last year, in what one law enforcement official this weekend described as a routine effort to "have a final cleanup."

Russia's intelligence service said Friday that it had opened a criminal investigation into British espionage here in Russia, based on statements and undisclosed evidence provided by a businessman who is accused of poisoning Alexander V. Litvinenko, a former K.G.B. officer and a Kremlin critic.

Prosecutors said the documents not only detailed Mr. Arnaout's early ties to Mr. bin Laden and other terrorists but also offered previously undisclosed evidence about the formation in the late 1980's of the organization that would become Al Qaeda, when it was dedicated to fighting Russia in Afghanistan.