The Internal Revenue Service Office of Chief Counsel has now been implicated in the agency's targeting of Tea Party and other conservative groups.
A retiring IRS tax lawyer, Carter Hull, testified before the House Oversight and Government Reform Committee Thursday that the IRS counsel was involved in the program targeting applications for tax exemptions by Tea Party groups for special scrutiny.
The office is headed by William Wilkins, one of only two Obama political appointees in the IRS.
While Hull said he was not specifically instructed to delay applications, he confirmed that following a meeting with the Chief Counsel's Office, application were forwarded on for further review - a move Hull told lawmakers was rare.
His testimony ties the targeting scandal to IRS officials in Washington.