The prosecutors are expected to argue that Lewinsky failed to live up to her end of a proposed deal.
Pelley said the former White House intern is not expected to testify any time soon before the grand jury investigating whether she had an affair with President Clinton and whether he asked her to lie about the alleged sexual liaison.
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Lewinsky's lawyer, William Ginsburg, has asked a judge to enforce the written immunity agreement. But sources tell CBS News that prosecutors never signed the agreement because, in their view, Lewinsky's lawyers changed the terms of the deal.
Although Lewinsky returned to Washington from California last week, Ginsburg said he did not know when she will be summoned before a grand jury. The lawyer said he still was "perfectly willing to listen" to any offer the prosecutor might have for Lewinsky's cooperation in the case.
In a related development, former Secret Service agent Lou Fox is expected to testify on Tuesday. CBS News has learned that prosecutors have also subpoenaed Secret Service agent Robert Owens, who once worked in a control room below the Oval Office. The administration has not yet decided whether to try to block the testimony of active officers.
Sources have also told CBS News that prosectors have subpoenaed records of the White House paging system. One source says Lewinsky paged Mr. Clinton's secretary dozens of times after she was called to testify in a lawsuit against the president.
In other developments:
- A Richmond, Va. woman has told Mr. Clinton's lawyers that she was asked to lie about a friend's allegation that Clinton made a sexual advance in the White House, according to her attorney.
The account by the woman, Julie Hiatt Steele, raises questions about the claims of Kathleen Willey, an acquaintance of Mr. Clinton who reportedly said in a deposition that the president made a pass at her in November 1993.
Steele's lawyer, John West of Richmond, said that lawyers defending Mr. Clinton in Paula Jones' sexual harassment lawsuit against him recently contacted his client.
West said Willey had told his client, "It would be OK if you lied."
- Ginsburg said he has joined several Democratic members of Congress in seeking a Justice Department investigation of Starr's "abusive behavior."
He said the department should consider turning the Lewinsky matter over B>"to another team" of independent prosecutors.
"We have a a prosecution system that's out of control," Ginsburg said.
©1998 CBS Worldwide Corp. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press and Reuters contributed to this report