Federal authorities arrested a Chicago police officer Friday morning for his alleged role in storming the U.S. Capitol on Jan. 6, when hundreds of supporters of former President Donald Trump attempted to prevent Congress from certifying the results of the presidential election.

Chicago Police Department officer Karol J. Chwiesiuk appeared remotely before U.S. Judge Gabriel Fuentes on Friday. Chwiesiuk faces charges of violent entry and disorderly conduct on Capitol grounds, and knowingly entering or remaining in a restricted building without lawful authority.

In a press conference Friday, CPD Superintendent David Brown said Chwiesiuk had been on the force for two years, and has been placed on desk duty since his arrest.