On July 13, 2025, San José Police Department patrol officers responded to a horrifying stabbing at Cataldi Park. Upon arrival, officers confronted a suspect armed with a large knife, who was hunched over a bleeding 9-year-old child. Despite repeated commands to disarm, the suspect charged at officers, prompting an officer-involved shooting. Tragically, the child had already suffered fatal injuries. Officers immediately provided aid and took the suspect into custody before he was transported to a hospital, where he was pronounced deceased. The suspect, identified as 48-year-old Mateusz Dzierbun of Fremont, was the child’s father. Investigators believe this horrific act was deliberate, intended to provoke a deadly confrontation with police. This is San José’s 13th homicide of 2025. This video contains real bodycam footage from officers at the scene. Viewer discretion is strongly advised.