Lindsey Halligan’s indictments against James B. Comey, the former F.B.I. director, and Letitia James, the attorney general of New York, were dismissed last month over Ms. Halligan’s appointment.

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Ms. Habba resigned on Monday, after a federal appeals court last week found she had been serving as U.S. attorney unlawfully.

© Kenny Holston/The New York Times

A five-year-old photo of agents kneeling at a D.C. protest after George Floyd’s killing led to the firing of about 16 agents.

© Tierney L. Cross/The New York Times