(CNN)— Even on Election Day 2024, the fallout from the rioting by Donald Trump supporters after the 2020 election is still unfolding: A man who was at the Capitol on January 6, 2021 and later participated in a group anti-government activist was sentenced to probation on Tuesday.

The case, when Fi Duong of Northern Virginia was first arrested, was one of the most striking reminders of the potential danger law enforcement was tracking among extremists after the attack on the Capitol.

Duong eventually pleaded guilty to felony civil disorder for his entry into the building, which he filmed wearing all black and a mask.

After the attack, Duong hosted meetings at his home with others who discussed U.S. secession, made Molotov cocktails and surveilled the Capitol, prosecutors said, citing an undercover agent who also attended the meetings. In the end he did not face any charges related to that group.

“Your participation in the January 6 riot was a betrayal of your oath as a Marine, and your failure to understand your conduct as participation in American domestic extremism is deeply troubling,” prosecutors wrote to the judge before sentencing.

Judge Paul Friedman of D.C. District Court, who has sentenced hundreds of Jan. 6 rioters, told Duong at Tuesday morning’s hearing that he believed he would not commit a repeat crime.

“This is an event in their history. Now you have a felony conviction for the rest of your life,” Friedman said. “I want to wish them the best of luck in the years to come.”

Duong will serve 36 months on probation, pay $2,000 in restitution to the Capitol and work 50 hours of community service, the judge ordered.

He was not jailed because he had complied with court orders while awaiting sentencing for about three and a half years, essentially under house arrest, Friedman added.

Duong now works at a go-kart track and takes care of his wife and son with special needs.

Friedman injected very little of the political overtones of the Jan. 6 attack into Tuesday’s proceedings, a departure from many of the sentencing of the Jan. 6 rioters, where judges have repeatedly condemned the extremist political climate created by Trump.

Duong’s lawyer noted that Duong still faces the punishment of being a felon, which will prevent him from holding elected office, and other loss of rights.

“If January 6 is indeed an ideological crime, the government knows that general deterrence does not work,” Sabrina Shroff, Duong’s defense attorney, told the court. He added that Duong regretted his crime.

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