Mark Mulliens Charged With Murder in Jacksonville Shooting
Authorities formally charged the 35-year-old suspect with murder following a fatal shooting on Mayfair Road.
Updated on Sept. 21, 2026 in Violence
Police have officially charged Mark Mulliens, 35, with the murder of 28-year-old Jarrius Brown. The charges follow an investigation into a shooting that took place at a residence on Mayfair Road.
Why it matters
The formal charge marks a significant development in the ongoing investigation into the death of Jarrius Brown. Authorities relied on surveillance footage and witness accounts to identify the suspect, who had previously been held on separate firearm charges.
Mark Mulliens is currently held at the Duval County jail, where he has been in custody since May 2026. The 35-year-old suspect was formally served with the murder charge on September 20, 2026.
The players
Mark Mulliens
He is the 35-year-old suspect who has served four previous prison terms for armed robbery and drug trafficking.
Jarrius Brown
He was the 28-year-old victim who died from gunshot wounds following a dispute on Mayfair Road.
Duval County jail
This is the detention facility where the suspect has been held in custody since May 2026.
The details
Detectives identified Mulliens as the primary suspect using a combination of area surveillance footage and witness interviews. Investigators determined that a physical dispute between Mulliens and Jarrius Brown escalated before a weapon was used, resulting in the victim dying from gunshot wounds.
Timeline
May 17, 2026: The shooting occurred at a residence on Mayfair Road.
May 27, 2026: Police arrested Mulliens on a charge of firearm possession by a convicted felon.
September 20, 2026: Police formally served Mulliens with the murder charge.
Legal Context
This case follows a pattern set by the Florida habitual felony offender sentencing statutes regarding the treatment of repeat offenders. The suspect's history of multiple prison terms for violent and drug-related offenses mirrors common legal challenges in managing high-risk recidivism.
The formal charging of a repeat offender provides the local community with an update on the progress of the case. While the suspect remains in custody at the Duval County jail, residents on Mayfair Road and the surrounding area should monitor local court dockets for future proceedings.
The takeaway
The investigation highlights the reliance on surveillance technology and witness cooperation in solving violent crimes in residential areas. It also underscores the ongoing monitoring of individuals with extensive criminal records by local law enforcement agencies.
Further reading
For more information on public safety, visit the Violence section.
Source note: This article includes information reported by Tampa Free Press.
