Rep. Mark Meadows Mark Randall MeadowsThe Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November House moves toward spending vote after bipartisan talks House Democrats mull delay on spending bill vote MORE (R-N.C.) suggested Thursday in an interview wth Hill.TV's "Rising" that evidence may have been tampered with in the case against former Trump national security adviser Michael Flynn.

Meadows, the leader of the conservative House Freedom Caucus and a close ally of President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's, said he and other lawmakers are finding evidence of possible tampering, an allegation he previously made at a House hearing where Justice Department Inspector General Michael Horowitz testified.

"Justice should be meted out evenly, and yet we’re finding that evidence could have been tampered with," Meadows said.

Meadows suggested one focus is whether FBI interview reports — known as 302 reports — about Flynn were altered to improve the chances he'd be prosecuted.

"I brought this up with the inspector general the other day. Some of those key witness will be asked to appear before House Oversight," he added.

The question about the FBI interview reports, he said, was "were they changed to change the outcome of prosecution decisions. I think they might have."

"We’re not going to yield until we get an answer," he added.

It's unclear what evidence he has to support the tampering claim, as he has not presented it publicly.

Trump fired Flynn in February 2017 after a short time on the job. He said at the time it was because Flynn lied to Vice President Pence, and later indicated it had to do with Flynn lying to the FBI.

Flynn pleaded guilty in December to lying to the FBI as part of special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's probe into Russian interference in the 2016 election.

Meadows has been among the most vocal lawmakers in his criticism of the Justice Department and its handling of the Russia probe. He and other conservatives have eagerly pursued access to Justice Department documents.

While the conservative lawmakers have received thousands of documents from the agency, they say they have not been able to review key documents nor have they received as many documents as they've requested, leading to rising tensions between Republicans and federal officials.