The Internal Revenue Service (IRS) building stands in Washington, D.C., U.S., on Wednesday, May 15, 2013. Photographer: Andrew Harrer/Bloomberg ( Andrew Harrer/Bloomberg)

Senior Internal Revenue Service official Holly Paz, who helped oversee the agency's internal review of how it scrutinized conservative groups' applications for tax-exempt status, hasn't been formally accused of any wrongdoing. But she has been on administrative leave since early June, and has been subject to harassment after coming under fire from congressional Republicans, according to her lawyer, Roel Campos.

In 2010, Paz also instructed Cincinnati IRS employees to "hold" tea party cases while Washington reviewed test cases, according to a spokesman for the Oversight and Government Reform Committee .

The controversy over how the IRS has treated tea party and other conservative groups has largely faded from public view. But the House Oversight and Government Reform Committee and other congressional panels are continuing to probe the matter, and the fallout from the scandal continues.