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La Puente Man Charged With Robbery After Alleged Assault on Clerk in Rancho Cucamonga

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Published on December 30, 2025
La Puente Man Charged With Robbery After Alleged Assault on Clerk in Rancho CucamongaSource: Unsplash / {Kenny Eliason}

On Sunday morning, a convenience store clerk faced violence when they requested a customer leave the establishment, the incident escalating into an alleged robbery in the Rancho Cucamonga area. According to a report by the San Bernardino County Sheriff-Coroner Department, at approximately 10:28 a.m., deputies responded to a call after an employee, who remains unnamed for their safety, was assaulted by David Diaz, a 28-year-old from La Puente.

After arriving minutes after the distress call, law enforcement discovered the suspect had already fled the scene; however, their swift action and inquiry into the matter revealed that Diaz became combative after being asked to leave, and in the heat of the situation not only chose to repeatedly strike the victim, but he also made off with merchandise without carrying out the transaction expected of a patron. Deputies managed to track down Diaz not far from the scene of the altercation, and it came to light that he was under active parole for a previous conviction involving a forceful offence.

Medical services were promptly summoned to attend to the clerk, who sustained injuries during the confrontation. Diaz faces robbery charges and is currently held at the West Valley Detention Center, as confirmed by law enforcement officials. The Sheriff's Department is calling on the community for any further information on the incident and recommends that tips be directed to the Rancho Cucamonga Sheriff’s Station at (909)477-2800 or the We-Tip Hotline at 1-800-78-CRIME for those wishing to offer information anonymously.