On October 21, 2026, the Cook County State’s Attorney’s Office, represented by Eileen O’Neill Burke, submitted a 78‑page brief to the U.S. Supreme Court. The filing argues that the county’s assault‑weapons ban is consistent with constitutional requirements.
The brief is intended to support the ban as the Supreme Court prepares to hear arguments on the case later in 2026. The ban has been the subject of a pending legal challenge, prompting the county to seek judicial affirmation of its legality.