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Father Stabs 9-Year-Old Son to Death in San Jose, Then Killed by Police After Luring Them to Park

NORTH SAN JOSE, CALIFORNIA, JUL 14 – The suspect allegedly stabbed his nine-year-old son before charging officers with a knife, prompting police to fatally shoot him, San Jose Police Chief said.

  • On Sunday afternoon at Cataldi Park in San Jose, 48-year-old Mateusz Dzierbun fatally stabbed his 9-year-old son before police fatally shot him.
  • Dzierbun called 911 just before 3:30 p.m., claiming an unknown assailant was stabbing his child, a call police later determined was a calculated ruse.
  • Officers arrived around 3:50 p.m. to discover Dzierbun holding a knife while positioned over his injured, bleeding son; after he ignored commands and suddenly charged at them, the officers were forced to open fire.
  • According to Police Chief Paul Joseph, the injuries sustained by the child were extremely severe and difficult to comprehend as being caused by the father, characterizing the incident as a tragic and senseless loss.
  • Investigators said Dzierbun had no criminal or mental health history, suspecting the stabbing and subsequent call were a premeditated suicide-by-cop act that lured officers into a deadly confrontation.
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Father stabs 9-year-old son to death in San Jose, then killed by police after luring them to park

A father fatally stabbed his 9-year-old son at a San Jose park Sunday afternoon before being shot and killed by officers who responded to what turned out to be a misleading 911 call, police said.

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SF Gate broke the news in San Francisco, United States on Monday, July 14, 2025.
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