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Thomas Webster, in red jacket, at a barricade line at the U.S. Capitol on Jan. 6, 2021, in Washington.The Associated Press

A former New York City police officer was found guilty on Monday of assaulting a Washington, D.C. police officer during the Jan. 6, 2021 riot at the U.S. Capitol by supporters of then-president Donald Trump, handing prosecutors another win at trial, a Justice Department spokesman confirmed. A federal jury in the District of Columbia rejected arguments by Thomas Webster, 56, that he was acting in self-defence when he struck a Washington officer with a flagpole and tackled him.

A spokesman for the U.S. Attorney’s Office said Mr. Webster will be sentenced on September 2.

Mr. Webster was the fourth Capitol riot defendant to take his case to a jury trial. The Justice Department has secured convictions in all four of those cases.

Of the four defendants to face a jury so far, Mr. Webster was the first to argue he was acting in self-defence.

Mr. Webster took the witness stand during the week-long trial. He told jurors that the officer had “incited” him by hitting him in the face.

“I felt like I was dealing with a rogue cop,” Mr. Webster testified during the trial.

Prosecutors had rejected Mr. Webster’s defence and portrayed the District of Columbia police officer, Noah Rathbun, as the victim in the altercation.

Prosecutors said Mr. Rathbun made physical contact with Mr. Webster to create distance between the two men, who were on opposing side of a police barricade eventually overrun by Trump supporters.

About 800 people are charged with a role in the Capitol riot, which disrupted a joint session of Congress to certify Joe Biden’s presidential election victory and sent lawmakers scrambling for safety. About 250 have pleaded guilty so far.

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