On November 16, 2023, at about 7:32 p.m., deputies answered an assault with a weapon call in the 7100 block of N. Barton Street in San Bernardino. They found 37-year-old Riverside resident Sergio Oscar Castaneda unresponsive with gunshot wounds; he was pronounced dead at the scene. A 23-year-old female was also discovered with gunshot injuries and taken to a hospital in critical condition.

The Sheriff’s Specialized Investigations Division Homicide Detail led the inquiry and identified 25-year-old San Bernardino resident Michael Pasillas as a suspect. Pasillas was located with help from the Specialized Enforcement Division and arrested on November 20, 2023; he was booked at the Central Detention Center on murder charges. The investigation remains ongoing.

Anyone with information is asked to contact Detective Travis Kleveno of the Specialized Investigations Division at (909) 890-4904 or submit an anonymous tip through We-Tip at 800-78CRIME or wetip.com. Did anyone in the area see or hear anything related to that evening?