A top FBI official who was heavily involved in ongoing probe into the Trump administration and potential Russian collusion was removed from the case several months ago for exhibiting an anti-Trump, pro-Hillary bias.

Before Peter Strzok was reassigned to the FBI’s human resources department in July amid allegations that he sent text messages critical of the president to a coworker he was allegedly having an affair with, he served as deputy head of counterintelligence. During his tenure, Strzok was one of the two FBI agents to interview Trump’s former national security advisor Michael Flynn — who on Friday pled guilty to lying to the agency about meetings with then-Russian ambassador Sergey Kislyak last December.

Strzok was also heavily involved in the investigation into Hillary Clinton’s private email server that she used to transmit classified information in violation of the law.

As The Daily Caller’s Chuck Ross pointed out, Strzok was the guy who interviewed Clinton’s longtime aides, Huma Abedin and Cheryl Mills, about their boss’s private, unsecured server she illegally used during her tenure as secretary of state. Abedin and Mills told the FBI they did not know about the server, but e-mails reveal these two had knowledge of the server prior to the FBI interview.

NEW: Embattled FBI supervisor Peter Strzok also conducted the interviews with Huma Abedin and Cheryl Mills, in which they falsely claimed they didn't know about Hillary's email server when she was Secretary of State. https://t.co/EZ8B1rG6oq @dailycaller — Chuck Ross (@ChuckRossDC) December 5, 2017

CNN reported that Strzok was also the FBI agent who helped then FBI director James Comey change the description of Clinton’s use of a private server from “gross negligence,” a punishable offense, to “extremely careless” in a statement that cleared the former secretary of criminal wrongdoing. FBI documents reveal Strzok was present when agency officials interviewed Hillary Clinton on July 2, 2016 about her use of a private, unsecured e-mail server to conduct official government business.

On July 2, 2016, Hillary Clinton was interviewed by the FBI…Present for the interview were Clinton's attorneys as well as FBI Section Chief Peter Strzok https://t.co/TJbsDwcs2o pic.twitter.com/mE5sH9563e — Nick Short (@PoliticalShort) December 4, 2017

As Sarah Carter reported, this news could cast doubt on the accuracy of Strzok’s official summary of his interview with Flynn. In light of his anti-Trump, pro-Hillary bias, Strzok’s involvement in the only piece of damning evidence against Flynn thus far could throw the entire Russia probe in doubt — especially considering his involvement in the FBI’s decision to ultimately give Hillary Clinton a free pass for her misdeeds.