House Oversight and Government Reform ranking member Darrell Issa (R-Calif.) on Wednesday called on FBI Director Robert Mueller to investigate allegations that the CIA lied to Members of Congress about its use of harsh interrogation techniques.

“The FBI should immediately launch an investigation so we can get the truth,— Issa told Mueller during a Judiciary Committee hearing. Mueller was on hand to testify before the committee on a separate topic.

Issa is the latest Member to insert himself into the controversy swirling around Speaker Nancy Pelosi (D-Calif.), who last week accused the CIA of lying to her during a 2002 briefing about its use of severe interrogation techniques — namely, waterboarding — on suspected terrorists.

Pelosi has “leveled a very serious charge,— Issa told Mueller, and it “calls into the question the credibility of the intelligence briefings Members of Congress receive.—