Deputy Adam Gibson, 31, was killed on January 18, 2021, during a violent confrontation at Cal Expo in Sacramento after a high-speed chase. Deputies had attempted to stop a vehicle matching the description of one tied to a series of thefts; the driver, Robert Stephen Calderon, led them through the complex and crashed. Calderon, armed with a semi-automatic handgun and in possession of methamphetamine, opened fire. Deputies returned fire; Calderon and Deputy Gibson were both killed. Gibson’s K-9 partner Riley also died in the exchange.

Calderon was on parole and had a lengthy criminal history including felony assault, vehicle theft, and drug possession, and had expressed a desire to die by suicide by cop — a fact that was known to law enforcement. Dashcam video released by the Sheriff’s Office shows deputies first using less-lethal bean bag rounds before lethal force was used when Calderon began firing. Gibson, a Marine Corps veteran who served two tours in Afghanistan, left behind his wife Rachel and their nine-month-old child; he had previously received the Sheriff’s Office Bronze Star for Bravery and a Major Incident Ribbon in 2018.

No additional suspects were identified.