Sunnyvale Police Arrest Two Suspects for Murder of Mountain View Mother

Monthslong investigation leads to arrests of two men, including the victim's former partner, in January shooting

Published on Mar. 10, 2026

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Following a monthslong homicide investigation, Sunnyvale police have arrested two men, Alfonso Inestroza and Gerzon Chirinos, for the fatal shooting of 24-year-old Kembery Chirinos-Flores, a Mountain View resident and mother of a 5-year-old son, in early January. Chirinos was previously in a relationship with the victim and is the father of her son.

Why it matters

This tragic and senseless act of violence has left a young child without a mother and a community in mourning. The arrests highlight the challenges law enforcement faces in investigating homicides and the need for continued efforts to address domestic violence and gun violence in the region.

The details

Police responded to reports of a shooting in Sunnyvale on January 7 and found Chirinos-Flores with gunshot wounds inside a vehicle. She was pronounced dead at the scene. Inestroza and Chirinos were arrested on March 5 in separate operations, with Inestroza having an outstanding warrant for an unrelated murder case in New Jersey. A shotgun believed to be the murder weapon was recovered.

  • On January 7, police responded to reports of a shooting in Sunnyvale at 9:39 p.m.
  • On March 5, Inestroza and Chirinos were arrested in separate operations.

The players

Kembery Chirinos-Flores

A 24-year-old Mountain View resident and mother of a 5-year-old son who was fatally shot in early January.

Alfonso Inestroza

A Hollister resident arrested on suspicion of murder, who also had an outstanding arrest warrant for an unrelated murder case in New Jersey.

Gerzon Chirinos

A Sunnyvale resident and the father of Kembery Chirinos-Flores' 5-year-old son, who was arrested on suspicion of murder.

Dan Pistor

Sunnyvale Chief of Public Safety, who provided details on the arrests and investigation during a press briefing.

Eugene Rosette

Sunnyvale Police Detective, who is handling the ongoing investigation and is asking for anyone with information to contact him.

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What they’re saying

“I can only imagine the profound pain Kembery's family is experiencing during this difficult time. Kembery was in the prime of her life. She was working two jobs to make ends meet, and she was a loving mother of a five-year-old son. This was a tragic and senseless act of violence that is fortunately extremely rare in our city.”

— Dan Pistor, Sunnyvale Chief of Public Safety (mv-voice.com)

What’s next

The investigation is still active, and anyone with information about the shooting is encouraged to contact Detective Eugene Rosette.

The takeaway

This case highlights the ongoing challenges in addressing domestic violence and gun violence in the region, and the need for continued efforts by law enforcement and the community to prevent such tragedies and support affected families.