HELENA, Mont. (AP) — A Montana appliance store owner and supporter of former President Donald Trump was convicted Wednesday for his role in the Jan. 6, 2021, breach of the U.S. Capitol that interrupted certifying the 2020 Electoral College vote.

The U.S. Attorney’s Office in Montana announced the verdict.

Henry Phillip Muntzer of Dillon was arrested based on social media posts and videos taken inside the Capitol, according to court records.

Muntzer, 55, was found guilty of obstructing an official proceeding and civil disorder, both felonies, following a bench trial before U.S. District Court Judge Jia M. Cobb. Muntzer was also found guilty of four misdemeanor charges. Sentencing is set for June 20.

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Prosecutors presented evidence that Muntzer and a group of friends traveled to Washington to attend the “Stop the Steal” rally. After Trump’s speech at the Ellipse, Muntzer joined the crowd walking to the Capitol, where he spent about 38 minutes, including time on the Senate floor. He was among the last people to leave, according to court records.

Muntzer was involved in physical confrontations with law enforcement officers in the Senate chamber and in the Capitol Rotunda, prosecutors said.

Muntzer said he was unaware that the Electoral College certification was going on that day and that in any case the Senate and House had both recessed by the time he entered the building. He argues he therefore didn’t interfere with anything.

Muntzer said Wednesday that he was not allowed to present all the evidence he was aware of, including some classified documents, which he said gives him grounds to appeal.

In Dillon, Muntzer is known for a pro-QAnon mural on the building that houses his appliance store, according to the Dillon Tribune. Many QAnon followers believe in baseless conspiracy theories.