Lev Parnas, the indicted ex-associate of Rudy Giuliani charged with federal campaign finance violations in New York, has asked U.S. Attorney General William Barr to recuse himself from the ongoing investigation and prosecution, alleging he has a conflict of interest.

In a letter to Barr, Parnas’ attorney Joseph Bondy said Monday that Barr’s proximity to the impeachment inquiry of President Donald Trump prevented him from impartially overseeing Parnas’ prosecution, and asked for the appointment of a special prosecutor from outside the Department of Justice.