WASHINGTON (AP) 鈥 A witness in the criminal case against Donald Trump over the hoarding of classified documents retracted 鈥減rior false testimony鈥 after switching lawyers last month and provided new information that implicated the former president, the Justice Department said Tuesday.

The statements from the witness, a Trump staffer identified in court papers as the director of information technology at Mar-a-Lago, was presented to prosecutors weeks before special counsel Jack Smith accusing Trump and two others in a plot to delete surveillance video at the Florida property.

Prosecutors said in a that the witness told a grand jury in Washington in March that he could not recall any conversations about the security footage

But in July, after being warned by prosecutors that he was a target of the investigation and after being advised that his lawyer might have a conflict of interest because of his representation of others in the probe, the witness received a new attorney from the federal defender's office and provided the Justice Department with information that helped form the basis of the revised indictment against Trump, his valet Walt Nauta and a third defendant, Carlos De Oliveira, the court filing says.

Prosecutors described the witness interaction in a filing that seeks a hearing in Florida about potential conflicts of interest involving the defense lawyer, Stanley Woodward, who also represents Nauta. Woodward declined to comment Tuesday to The Associated Press.

鈥淭he target letter to Trump Employee 4 crystallized a conflict of interest arising from Mr. Woodward鈥檚 concurrent representation of Trump Employee 4 and Nauta,鈥 prosecutors wrote.

They added: 鈥淎dvising Trump Employee 4 to correct his sworn testimony would result in testimony incriminating Mr. Woodward鈥檚 other client, Nauta; but permitting Trump Employee 4鈥檚 false testimony to stand uncorrected would leave Trump Employee 4 exposed to criminal charges for perjury.鈥

In the filing, the Justice Department also sought to explain its use of grand juries in both Washington and Florida, where charges were ultimately filed. U.S. District Judge Aileen Cannon, a Florida judge presiding over the case, had earlier asked about the legal propriety of using grand juries in both districts.

Prosecutors said they continued using the Washington grand jury even after charges were filed in Florida for the express purpose of investigating potential false statements by witnesses in Washington. The Washington grand jury completed its term last week, they said.

A trial has been set for in the classified documents case. Trump has pleaded not guilty and denied any wrongdoing.

Trump is , over efforts to overturn the results of the 2020 presidential election, over attempts to subvert that state's vote and another in New York in connection with

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