Maame Ewusi-Mensah Frimpong

Career From 2001 to 2002, Frimpong served as a law clerk for Judge Stephen Reinhardt of the United States Court of Appeals for the Ninth Circuit. She then worked as an associate at Morrison & Foerster from 2002 to 2007. From 2007 to 2015, she served in various positions in the United States Department of Justice, including in the Civil Division. In 2015, Frimpong became vice president, general counsel and corporate secretary of the Millennium Challenge Corporation.

In 2015, she was appointed by Governor Jerry Brown to serve as a judge of the Los Angeles County Superior Court to fill the vacancy left by the retirement of Thomas R. White.

Federal judicial service

On September 8, 2021, President Joe Biden announced his intent to nominate Frimpong to serve as a United States district judge of the United States District Court for the Central District of California. Her nomination helped to fulfill President Biden’s pledge to appoint more female and minority judges; the White House press release announcing her nomination noted that Frimpong “would be the first Black woman to serve on the Ninth Circuit from California, as well as the second Black woman to ever serve on the Ninth Circuit.” On September 20, 2021, her nomination was sent to the Senate. President Biden nominated Frimpong to the seat vacated by Judge Christina A. Snyder, who assumed senior status on November 23, 2016. On October 20, 2021, a hearing on her nomination was held before the Senate Judiciary Committee. On December 2, 2021, her nomination was reported out of committee by a 12–10 vote. On December 17, 2021, the United States Senate invoked cloture on her nomination by a 47–24 vote. Her nomination was confirmed later that day by a 46–24 vote. She received her judicial commission on February 7, 2022.

Notable rulings

On August 1, 2025, Frimpong blocked the Trump administration's "roving" immigration arrests amid its large-scale immigration crackdown in Los Angeles, saying aspects of the operation were unconstitutional.

She ruled that ICE agents were conducting "roving patrols" of the city and coordinating arrests without "reasonable suspicion" that their targets were in the country illegally. She also ruled that they have been relying on improper factors including race, accent, and occupation.

An appeal by the federal government to the Supreme Court of the United States requesting a stay of the order was granted by the Court on September 8, 2025. The case continues through the federal court system.