Calif. Sheriff's Deputy Dies after On-Duty Medical Emergency

Life-saving measures were performed on San Joaquin County Sheriff's Office Sgt. Jason Whelen, but the deputy couldn't be revived after suffering a medical emergency while working a shift.
Feb. 26, 2026

What to know

  • A San Joaquin County Sheriff’s Office sergeant died Tuesday after suffering a medical emergency while on duty, according to the agency.
  • Deputies and medics attempted extensive life‑saving measures, but Sgt. Jason Whelen did not survive, the sheriff’s office stated.
  • Flags at the California State Capitol were ordered to half-staff as the department and community honor Whelen’s service.

A California deputy died Tuesday after suffering a medical emergency.

San Joaquin County Sheriff's Office Sgt. Jason Whelen was on duty when the medical issue occurred, according to a news release from the agency. Fellow deputies and medics performed "extensive life-saving efforts" on the sergeant, but Whelan passed away. 

"(Whelen) was known within the Sheriff’s Office for his kindness, steady leadership, love of Jesus Christ, and infectious smile," stated the department. "He brought positivity to those around him and was someone who could always be counted on."

Whelen joined the sheriff’s office in October 2007. He was promoted to sergeant in 2013, and "he served this community with honor, integrity, and compassion," according to the department.

He is survived by his wife and four children.

Gov. Gavin Newsom ordered flags at the State Capitol and Capitol Annex Swing Space to be flown at half-staff in Whelen's honor.

"Sergeant Whelen dedicated his life to public service, and that commitment came with extraordinary courage and sacrifice," Newsome said in a statement.

"We honor his service to protect his community with profound gratitude," he added.

About the Author

Joe Vince

Joining Endeavor Business Media in 2018, Joe has worked on the company's city services publications. He began working at OFFICER.com as the assistant editor. Before starting at Endeavor, Joe had worked for a variety of print and online news outlets, including the Indianapolis Star, the South Bend Tribune, Reddit and Patch.com.
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