WASHINGTON >> FBI Director Christopher Wray has ordered an internal review into possible misconduct in the investigation of former Trump administration national security adviser Michael Flynn, the bureau said today.

The after-action review will examine whether any employees engaged in misconduct during the course of the investigation and evaluate whether any improvements in FBI policies and procedures need to be made.

In announcing the review, the FBI, a frequent target of President Donald Trump’s wrath, is stepping into a case that has become a rallying cry for Trump supporters — and doing so right as the Justice Department pushes back on criticism that its recent decision to dismiss the prosection was a politically motivated effort to do Trump’s bidding.

The announcement adds to the internal scrutiny over one of special counsel Robert Mueller’s signature prosecutions during his investigation into ties between Russia and the 2016 presidential campaign. It underscores how a case that was seemingly resolved by Flynn’s 2017 guilty plea has instead given way to a protracted, politically charged debate about FBI tactics during that prosecution and the Russia investigation more broadly.

The unusual review will be led by the bureau’s Inspection Division, which conducts internal investigations into potential employee misconduct. Trump has recently been sharply critical of the FBI, and two weeks ago even suggested that Wray’s fate as director was in limbo, but an FBI official said today that the review had been contemplated for some time.

Though the division does not have authority on its own to bring a criminal prosecution, the after-action review will look at whether any current employees engaged in misconduct deserving of discipline. The division cannot take disciplinary action against former employees.

The FBI did not say what sort of potential misconduct it was looking for in the investigation of Flynn, who pleaded guilty to lying to agents about conversations with the Russian ambassador during the presidential transition. But the case has long been a subject of outrage for Trump and his allies, who have alleged that Flynn was effectively set up to lie when agents questioned him at the White House in January 2017.

Those concerns were given new life earlier this month when the Justice Department moved to dismiss the case and identified a series of what it says were problems in the way Flynn was investigated.

The motion to dismiss alleges that agents had insufficient basis to interview Flynn in the first place, especially since the FBI had been prepared earlier in the month to close out its investigation into Flynn after finding no crime. It says any imperfect statements he may have made during the interview were not material to the underlying investigation into ties between Russia and Trump’s presidential campaign.

Attorney General William Barr, who earlier this year overruled the sentencing recommendation of prosecutors in the case of Trump associate Roger Stone, defended the Flynn’s decision and said in a television interview that he was doing the “law’s bidding.” The Justice Department noted that he was acting on the recommendation of U.S. Attorney Jeff Jensen of St. Louis, who was assigned by Barr to review the Flynn case.

But the move outraged former law enforcement officials involved in the case, who said the Justice Department had ignored the seriousness of the false statements that Flynn had admitted making as well as the gravity of their national security concerns about Flynn’s interactions with the ambassador, Sergey Kislyak.

Flynn admitted in his guilty plea that he lied about having asked Kislyak to refrain from escalating the situation in response to sanctions imposed against Russia by the Obama administration for election interference. Obama administration Justice Department officials warned the Trump White House about that conversation, saying public misrepresentations about it left Flynn vulnerable to being blackmail by Russia.

The request to dismiss the case has triggered its own internal court fight. U.S. District Judge Emmet Sullivan has assigned a retired judge to argue against the Justice Department’s position, but Flynn’s attorneys have asked a federal appeals court to order Sullivan to dismiss the case — and to reassign any future court proceedings to another judge. An appeals court panel has asked for Sullivan to respond to the defense request.

The FBI said that in addition to its own internal review, it has cooperated with multiple inquiries assigned by Barr, including assigning its own agents to the Jensen probe.

“Director Wray authorized this additional level of review now that the Department of Justice, through Mr. Jensen’s work, has developed sufficient information to determine how to proceed in the Flynn case,” the FBI statement said. “However, Mr. Jensen’s work will continue to take priority, and the Director has further ordered the Inspection Division to coordinate closely with Mr. Jensen and ensure that the review does not interfere with or impede his efforts.”