Washington ? A second Time magazine reporter has agreed to cooperate in the CIA leak case and will testify about her discussions with Karl Rove’s attorney, a sign that prosecutors still are exploring charges against the White House aide.

Viveca Novak, a reporter in Time’s Washington bureau, is cooperating with Special Counsel Patrick Fitzgerald, who is investigating the leak of CIA operative Valerie Plame’s identity in 2003, the magazine reported in its Dec. 5 issue.

Novak specifically has been asked to testify under oath about conversations she had with Rove attorney Robert Luskin starting in May 2004, the magazine reported.

Novak, part of a team tracking the CIA case for Time, has written or contributed to articles in which Luskin characterized the nature of what was said between Rove and Matthew Cooper, the first Time reporter who testified in the case.

Cooper appeared before the grand jury in July after Time surrendered his notes and e-mail detailing a conversation with Rove. Cooper agreed to talk and avoid jail after disclosing that his source – now confirmed to be Rove – released him from his confidentiality agreement.

Rove has remained under investigation for his involvement in leaking Plame’s identity.

Plame’s CIA status was exposed by conservative columnist Robert Novak in July 2003, eight days after her husband accused the U.S. government of manipulating prewar intelligence to exaggerate the Iraqi threat. Time’s Novak is not related to Robert Novak.

Rove spoke to Robert Novak and Cooper about Wilson’s wife and her CIA status before each of the two journalists disclosed Plame’s identity.