A 19-year-old Rancho Cucamonga man wanted for attempted murder after a shooting in unincorporated Hesperia has been arrested — but not by the deputies who were looking for him. Adam Marquez was taken into custody by the Riverside County Sheriff's Department on September 9, a day after the San Bernardino County Sheriff's Department named him as the suspect in a shooting that left a man wounded in the abdomen.
According to Victor Valley News, deputies from the Victor Valley Sheriff's Station responded to a report of an assault in the 12700 block of Fir Street at 8:26 p.m. on September 7. There, they found an adult man outside the residence suffering from an apparent gunshot wound to the abdomen. Marquez had already fled on foot before deputies arrived, authorities said.
Inside the home, investigators located a single fired cartridge casing in the living room and observed a bullet hole in the rear door, according to the same report. The Fir Street address sits in an unincorporated pocket of Hesperia, which falls under the jurisdiction of the county sheriff's Victor Valley Station rather than the city's contracted police department — a distinction that explains why county deputies, not Hesperia officers, handled the initial response.
An Awkward Jurisdictional Handoff
Marquez remains in Riverside County custody for now. The source reports that he will be transferred into San Bernardino County Sheriff's Department custody after the Riverside County case is completed. He will be transferred into San Bernardino County Sheriff's Department custody once that Riverside County case concludes, authorities said.
It is not yet clear what charges Marquez faces in Riverside County, nor is the condition of the Hesperia shooting victim currently known — both open questions as the case moves through two separate court systems at once.
A Busy Stretch for Victor Valley Deputies
The Fir Street shooting lands in the middle of an unusually active stretch for law enforcement across Hesperia's unincorporated fringes. Three days earlier, deputies arrested a 52-year-old man on suspicion of attempted murder and kidnapping after a welfare check on Locust Avenue turned into gunfire and a hostage standoff. Three weeks before that, deputies shot and wounded an armed man near the California Aqueduct after he climbed out of the water with a knife and advanced on officers.
The shooting also falls within the window of Operation Consequences, a multi-agency crime suppression push that targeted Hesperia and eight other cities from August 24 through August 30, 2026, and resulted in 11 felony arrests and eight firearm seizures across San Bernardino County. A July 20–26 operation produced 84 arrests and the seizure of 22 firearms, according to county data. The Victor Valley Station handled the initial response, while incorporated Hesperia's population climbed to an estimated 102,605 residents in 2025.
What Marquez Could Face
If prosecutors ultimately charge Marquez with attempted murder under California Penal Code Sections 664 and 187, he would face five, seven, or nine years in state prison for a second-degree conviction — or up to life imprisonment with the possibility of parole if prosecutors can prove the attempt was willful, deliberate, and premeditated, according to legal guidance from H Law Group. The attempted-murder allegation concerns the shooting of the wounded man.
The Fir Street block sits near a residential corridor. Anyone with information on the current case is asked to contact the Victor Valley Sheriff's Station at (760) 552-6800 or sheriff's dispatch at (760) 956-5001. Tips can also be submitted anonymously through the We-Tip hotline or by texting the word REPORT to 844-909-3006.
