Ex-Phoenix Cop Denies Inciting Violence at Student Protest in Federal Lawsuit
Former Phoenix sergeant Dusten Mullen denies inciting violence at a student protest in his ongoing federal lawsuit.
Why it matters: This case spotlights police accountability and the legal limits of officer conduct, especially during protests. Legal professionals following law enforcement litigation and civil rights should monitor the outcome and its implications.
- Sergeant Dusten Mullen was fired after attending a student protest off duty, masked and armed.
- Mullen is accused of intending to provoke arrests by baiting student protesters, which he denies.
- U.S. District Judge Susan Brnovich allowed Mullen's termination process to proceed.
- Mullen's federal suit claims his rights were violated and alleges retaliation.
Former Phoenix Police Sergeant Dusten Mullen is at the center of a high-profile federal case after his firing for conduct during a student protest at Hamilton High School in Chandler, Arizona, on January 30, 2026.
- Mullen, off-duty and masked, attended the protest while carrying a handgun and extra magazines.
- During the demonstration, Mullen declared, "My plan is legitimately to just let them all assault me, and you guys arrest them all."
Phoenix Police Chief Matt Giordano announced Mullen's termination on May 14, 2026, citing "significant concerns about judgment and professionalism." Giordano emphasized, "Although he was off duty and not in uniform, the oath we take binds us to a higher standard."
Mullen is now suing the City of Phoenix, Chief Giordano, and City Councilmember Anna Hernandez in federal court, alleging that the firing was retaliatory and violated his First Amendment rights.
On May 5, 2026, U.S. District Judge Susan Brnovich refused Mullen's attempt to halt the discipline, allowing the city to proceed with his termination.
"Sgt. Mullen is disappointed by this decision, but not surprised," said his attorney, Steve Serbalik. "While he hoped that the City of Phoenix and Chief Giordano would conduct a 'thorough and fair' investigation — that is not what occurred. It will now be up to the Court to protect the rights of Sgt. Mullen."
The case is drawing scrutiny for its implications on law enforcement oversight and the boundaries of officer conduct, both on and off duty. Legal observers are watching to see whether the case sets new precedents for future police discipline and First Amendment claims.
By the numbers:
- January 30, 2026 — Date of student protest at Hamilton High School.
- May 5, 2026 — Judge denied Mullen's request to halt his discipline.
- May 14, 2026 — Phoenix police chief announced Mullen's termination.
Yes, but: The full findings of the internal investigation and the outcome of Mullen's lawsuit remain undisclosed.
What's next: A decision in Mullen's federal lawsuit will determine if his termination stands or is overturned.