Suspect in Antioch assault dies in traffic collision after running onto Hwy 4
Struck by on-duty County DA Senior Inspector
Multi-agency investigation ensues
By Lt. William Whitaker #6155, Antioch Police Investigations Bureau
On Monday, December 22, at 10:33 a.m., the Antioch Police Department Dispatch Center received a call from security personnel at the Comfort Inn, located at 2436 Mahogany Way, reporting that a suspect had pulled a fire alarm and then struck a security guard.
Responding officers arrived on scene and located the 47-year-old male security guard who was pursuing the suspect in the area behind Kaiser, near Delta Fair Boulevard.
An Antioch Police Department officer was in the area with emergency lights activated while responding to the call. The 27-year-old male suspect, who possibly saw the lights, then jumped over a fence and ran onto the freeway, where he was struck by an on-duty Contra Costa County District Attorney Senior Inspector who, by chance, was driving in the area and was not involved in the initial incident.
At no time were responding Antioch Police Department officers involved in a foot pursuit of the suspect.
The investigator and Antioch Police Department officers immediately rendered medical aid; however, the suspect died at the scene.
A witness, who chose not to be identified and was stuck in the eastbound traffic back-up on Highway 4 between Loveridge Road in Pittsburg and Somersville Road in Antioch, said he saw police pumping the suspect’s chest. According to Spotlight CoCoCounty, the suspect “was struck in the number one lane near the Center divide.”
The back-up lasted for about two-and-a-half hours until Antioch Police issued an update at 1:07 p.m. that “the roadway is now open.”
The suspect’s name is not being released at this time due to the ongoing investigation.
As is standard protocol, the Antioch Police Department, the Contra Costa County District Attorney’s Office and the California Highway Patrol will conduct a joint investigation into the incident. Any additional information will be provided by the Investigations Bureau.
Additional inquiries, tips, or information can be directed to Antioch Police Detective Robert Ibanez at (925) 481-8398 or by email at ribanez@antiochca.gov.
Allen D. Payton contributed to this report.
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Emergency personnel & backup Hwy 4 fatality 12-22-25
