Rick Gates, the former deputy campaign manager for Donald Trump and ex-business partner of Paul Manafort, was sentenced to three years probation and 45 days in jail on Tuesday after he cooperated extensively with federal investigators.

Gates and Manafort were the first ex-Trump campaign officials to be charged by former special counsel Robert Mueller, accused of evading taxes and violating lobbying laws by concealing millions of dollars they earned representing pro-Russian politicians in Ukraine. Gates had pleaded guilty and spent more than 500 hours assisting government lawyers and federal agents.

His lawyers told U.S. District Judge Amy Berman Jackson that he should avoid jail time because he cooperated extensively with the government. Federal prosecutors did not oppose that request.

Manafort is currently serving a seven-and-a-half year sentence in federal prison after he was convicted on charges that he evaded taxes and violated federal lobbying laws by concealing millions of dollars he and Gates earned in Ukraine.

Gates, who pleaded guilty in 2018, agreed to cooperate with Mueller’s team and other federal investigators. Court documents show he met with investigators at least 50 times, spending more than 500 hours with government lawyers and federal agents. He testified as a government witness in Manafort’s trial as well as the trial of Trump’s longtime associate Roger Stone and former President Barack Obama’s White House Counsel Greg Craig, who did legal work for Manafort.

Gates provided “extraordinary assistance,” federal prosecutors said in their memo telling the judge they would not oppose his request for probation.

Gates joined the Trump campaign in March 2016 and later served on the president’s inaugural committee. He an Manafort were indicted in October 2017, and Gates pleaded guilty the following February.