Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF)

Rule Changes

As of August 2026: Defendant; issued the rule being challenged

The Ninth Circuit on August 21 vacated a district court ruling that had struck down part of the ATF's 2022 ghost gun regulation. A unanimous panel found that California and the Giffords Law Center to Prevent Gun Violence lacked standing to challenge Example 4 of the frame-and-receiver rule.

Updated Aug 23

Force in Play

As of May 2026: Assisted with firearms-related investigative support

Brown's Dec. 13 shooting evolved from a campus lockdown into an extended manhunt. Gunfire killed two students—Ella Cook and Mukhammad Aziz Umurzokov—and wounded nine others; the initially detained suspect was released, and investigators have used residential and vehicle-camera footage to track the shooter's movements.

Updated May 15