Full Notification

San Mateo, CA – On June 11, 2026, at approximately 9:55 p.m., officers from the San Mateo Police Department responded to the 400 block of E. Bellevue Avenue regarding a report of multiple subjects involved in a physical fight in the backyard of a private residence.
 
Upon arrival, officers learned that during the altercation, an adult male identified as Deyson Lopez Cardona allegedly struck another adult male multiple times in the head with an aluminum pole, causing significant injuries. A second adult male, identified as Abner Lopez Cardona, allegedly committed battery during the incident. The victim was medically evaluated at the scene and transported to a local hospital for additional treatment.
 
Based on probable cause established during the investigation, Deyson was arrested for assault with a deadly weapon, and Abner was arrested for battery. Both were transported to the San Mateo County Jail, where they were booked on their respective charges.
 
The San Mateo Police Department encourages community members to seek peaceful and constructive ways to resolve disputes before they escalate into violence. The Peninsula Conflict Resolution Center (PCRC) provides mediation, conflict coaching, and communication services that help individuals address disagreements, improve understanding, and reach mutually acceptable solutions. Through early intervention and collaboration, community resources such as PCRC can play an important role in reducing conflict, strengthening relationships, and promoting safer neighborhoods throughout San Mateo County.
 
ARRESTED
Deyson Lopez Cardona, 27-year-old San Mateo resident
Abner Lopez Cardona, 18-year-old San Mateo resident
 
CHARGES:
Deyson Lopez Cardona -PC 245 (A) (1)-Assault with a Deadly Weapon not a Firearm
Abner Lopez Cardona-PC 242-Battery