Washington (CNN) Rick Gates continues "to this day" to help special counsel's Robert Mueller office in its investigation into Russians, the Trump campaign and the 2016 election, he said in a court filing Thursday.

The former Donald Trump campaign aide cited the "numerous" times he's visited the special counsel's office in recent months as he asked a federal judge in Washington to relax the court-ordered restrictions he's under as he awaits sentencing.

Gates implored the judge to remove his GPS monitoring bracelet, free him from a nightly curfew and allow him to travel more freely around Virginia and Washington. His recent help to investigators shows he won't flee, the filing says, adding that Mueller's office did not take issue with the request.

He has built a "record of continuing cooperation" with prosecutors since he pleaded guilty to charges of conspiracy and lying to investigators in February, his attorney Tom Green wrote in the filing.

A major part of Gates' cooperation so far included him testifying at trial in August against his longtime boss and former Trump campaign chairman Paul Manafort. In two days of bitter questioning on the witness stand, Gates admitted to embezzling from Manafort and accused him of masterminding a financial scheme. During the trial, the special counsel's office said some in-court discussion about Gates and the Trump campaign would disclose "new" details about the investigation.

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