Klete Keller, a former Olympic swimmer who won two gold medals for the United States, on Wednesday pleaded guilty to a felony charge related to his participation in the January riot at the Capitol by supporters of Donald Trump.

Keller admitted to obstructing an official proceeding, after prosecutors agreed to drop six other criminal charges they brought against him in February.

US district judge Richard Leon in the District of Columbia accepted Keller’s guilty plea at a court hearing. Leon will sentence Keller at another hearing that has yet to be scheduled.

The charge has a recommended sentence of between 21 and 27 months in prison, but Leon is not bound by that range.

Keller is a five-times Olympic medalist who held off Australian great Ian Thorpe on the anchor leg of the 4x200m freestyle relay at the 2004 Athens Games to win gold for the United States.

More than 600 people have been charged with taking part in the 6 January violence, which followed a speech by Trump at a nearby rally repeating his false claims that his election loss to Democrat Joe Biden was the result of widespread fraud. Those claims have been rejected by multiple courts, state election officials and members of Trump’s own administration.

Keller, a Colorado resident, wore a Team USA jacket when he entered the Capitol during the riot.

According to prosecutors, Keller was in the Capitol for nearly an hour, at one point yelling “Fuck Nancy Pelosi!” and “Fuck Chuck Schumer!” before others began pushing toward law enforcement officers.

Pelosi and Schumer are the Democratic party’s congressional leaders.