Updated 2:39 p.m. ET, 3/2/2014
(CNN) – Lois Lerner, former director of tax exempt organizations for the IRS, will testify this week on Capitol Hill, Rep. Darrell Issa said Sunday.
Issa said he received word from Lerner's attorney that she will provide testimony to the House Oversight and Government Reform Committee about her role in potentially unfair targeting of certain political groups by the IRS.
But Lerner’s attorney, William Taylor, tells CNN "she intends to continue to assert her Fifth Amendment rights."
A spokesman for Issa told CNN later Sunday that Lerner requested a one week delay in testifying but was told she must make that request at a hearing Wednesday.
Issa, chairman of the committee, made the original confirmation on "Fox News Sunday."
Lerner retired last year after being placed on administrative leave by the IRS after she said the IRS applied extra scrutiny to both conservative and liberal political groups seeking tax-exempt status between 2010 and 2012.
She testified before Issa's committee in May, reading a statement saying she had not broken any laws or regulations, but invoked her Fifth Amendment privileges in refusing to answer questions.
Republicans said Lerner waived her Fifth Amendment rights by reading that statement.
Issa said Sunday that Lerner was given no immunity ahead of her testimony. He speculated she's willing to testify now because of mounting evidence against her.
"We've interviewed the people all around her to build a case for why she is at the center of this targeting," Issa said.
CNN's Dana Bash, Kevin Bohn and Deirdre Walsh contributed to this report.