WATCH: Judiciary chairman questions whether Comey lied to Congress

House Judiciary Committee Chairman Bob GoodlatteRobert (Bob) William GoodlatteWill Congress ever hold our federal agencies accountable for contempt? Lots of love: Charity tennis match features lawmakers teaming up across the aisle Dems try to end hearing on bias against conservatives in tech MORE (R-Va.) told The Hill his panel will subpoena the FBI "very soon" for documents related to the conduct of former FBI Director James ComeyJames Brien ComeyThere was nothing remotely treasonous in Trump's performance with Putin Opinion: One FBI text message in Russia probe that should alarm every American Clapper: Intel officials showed Trump evidence of Putin's role in election meddling MORE and his former deputy, Andrew McCabe. 

Goodlatte said McCabe's recent statements — made since Attorney General Jeff Sessions fired him — raised questions about Comey's prior sworn testimony to Congress where he denied authorized leaking to the press about Donald Trump or Hillary Clinton while FBI director. 

McCabe in a statement after his firing said Comey "was aware" that he had shared information with a reporter. The FBI's Office of Personnel Responsibility (OPR) cited the leak of the information in its recommendation to fire McCabe.

"I'm very concerned about it. This is a serious matter and their statements, the statement that Mr. McCabe released recently, following his firing, and Mr. Comey's sworn testimony before the Senate Judiciary Committee conflict. We don't know who's telling the truth and who's not, but that is a serious issue," Goodlatte said in an interview.

"Mr. McCabe's statement was a statement made following his firing and he was not under oath when he made that statement, but this is a clear indication that somebody wasn't telling the truth and misrepresenting to the public and to the Congress," Goodlatte added.

Under questioning from Sen. Chuck Grassley (R-Iowa), Comey in May testified that he had never authorized leaks of information on the two 2016 candidates or been an anonymous source in news stories about investigations related to them. He also said he had no knowledge of classified information about either campaign being shared with the press.

Click on the video above to hear Goodlatte in his own words.