WASHINGTON — The man accused of throwing a sandwich at a federal agent last month pleaded not guilty on Wednesday and requested a jury trial in his misdemeanor assault case. Sean Dunn, 37, wearing a white button-down shirt with a blue tie, was largely stoic during the 10-minute hearing before U.S. District Court Judge Carl J. Nichols. Dunn pleaded not guilty and the judge set Nov. 3 for the start of trial.

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