WASHINGTON (AP) — A top supervisor in the federal prosecutors’ office in Washington said she was forced to resign following a dispute with her boss over a directive that she scrutinize the awarding of a government contract during the Biden administration, according to a letter reviewed by The Associated Press.

She refused a Trump administration demand to freeze environmental grant assets.

Denise Cheung, a senior U.S. prosecutor, resigned after rejecting a Trump-appointed demand to investigate a Biden-era contract without evidence. She also refused pressure to freeze assets unlawfully.