David Joseph Moreno was arrested for allegedly stabbing two people in Ontario.  (Contributed photo by San Bernardino County Sheriff's Department)

The Ontario Police Department has arrested a man believed to be responsible for two stabbings that took place at De Anza Park and Cypress Park in Ontario on July 24, according to the San Bernardino County Sheriff's Department.

The first incident occurred at De Anza Park at about 10:20 a.m. when the suspect, David Joseph Moreno, age 27 of Ontario, allegedly used a knife to attack a man without provocation. The victim was able to fight off the attack but did receive a non-life threatening injury to his neck.

Moreno then drove to Cypress Park, where he allegedly used a knife to attack a second male victim. Moreno knew the second victim prior to the attack, authorities said. The victim was transported to a local hospital for treatment of life-threatening injuries caused by the stabbing.

Ontario patrol officers were able to identify Moreno based on prior contacts and information received from the investigation.

At about 1 p.m., the Ontario Police Career Criminal Division and Multi Enforcement Team located Moreno at the corner of Euclid Avenue and Budd Street, where he was apprehended without incident. Moreno was in possession of a knife at the time of his arrest. He has been booked at West Valley Detention Center on two counts of attempted murder.

Moreno’s girlfriend, Taylor Willis, age 21 of Rancho Cucamonga, was with Moreno at the time of his arrest. She was arrested as an accessory to attempted murder but was later released pending further investigation.

Anyone with information regarding the incident is asked to contact the Ontario P.D. at (909) 986-6711 or Corporal Kyle Mena at (909) 408-1769. Information can also be reported anonymously by calling We-Tip at 800-78-CRIME or online at

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