WASHINGTON (AP) — A judge who was the plaintiff in a landmark Maryland racial-profiling case has been sworn in as a judge on the U.S. Court of Appeals for the District of Columbia Circuit.

Friday’s investiture ceremony for Judge Robert Wilkins was attended by Supreme Court Chief Justice John Roberts and Justice Elena Kagan. The D.C. Circuit hears some of the nation’s highest-profile cases and is considered a stepping stone to the Supreme Court.