Event Brief
Ex-con charged with murder after Jacksonville shooting
By The BriefBrief · Sources (1)
Filed: Sep 21, 2026 at 5:00 PM ET
Summary: Mark Mulliens, 35, a convicted felon released from state prison last year, has been charged with murder in the death of 28-year-old Jarrius Brown. Officers responded May 17 to a reported shooting at a home on Mayfair Road near Beach Boulevard, where Brown later died from a gunshot wound.
WHO: Mark Mulliens, 35; Jarrius Brown, 28; District 1 Patrol officers; homicide detectives
WHAT: Mulliens was charged with murder after a fatal shooting following an altercation that escalated and ended with Mulliens shooting Brown and fleeing on foot.
WHEN: May 17, 2026
WHERE: Mayfair Road near Beach Boulevard, Jacksonville
WHY: The dispute between Brown and Mulliens escalated until Mulliens pulled out a weapon and shot Brown.
How this brief is built: The BriefBrief uses multi-source information fusion to correlate reporting across sources, identify related developments, and continuously update a structured WHO, WHAT, WHEN, WHERE and WHY event picture. Pattern arcs, source analysis, and velocity indicators provide deeper analysis in our MI Console.
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