An Oxnard man was arrested after authorities recovered large quantities of drugs and several illegal firearms, including ghost guns and high-capacity magazines, during a narcotics investigation in Ventura County.
According to the Ventura County Sheriff’s Office, detectives launched an investigation into the alleged drug trafficking activities of Irvin Ulisses Martinez, 37, of Oxnard.
Investigators identified Martinez as a suspected drug trafficker distributing controlled substances throughout Ventura County, the agency said. Detectives obtained a search warrant for Martinez, his home and his vehicles.
On Oct. 16, narcotics detectives detained Martinez in Oxnard as part of the warrant operation. A search of his vehicle uncovered several hundred counterfeit M30 fentanyl pills, cocaine packaged for sale, and a loaded 9 mm handgun, according to the sheriff’s office.
Detectives then searched Martinez’s residence in the 1800 block of Diego Way, where they discovered additional cocaine, methamphetamine, fentanyl pills, and evidence indicating drug sales. Six firearms were seized from the home, including four assault weapons under California law, the sheriff’s office said.
Two additional AR-15-style rifles were found in various stages of assembly, and several of the recovered guns lacked serial numbers — known as “ghost guns” — which are illegal in the state. Investigators also located one short-barreled rifle, a suppressor, and about 10 high-capacity magazines, including a 50-round drum magazine for a semi-automatic shotgun.
Martinez was arrested and booked into the Ventura County Pre-Trial Detention Facility on multiple narcotics and weapons charges. The Ventura County District Attorney’s Office filed a criminal complaint against him on Oct. 17, and Martinez remains in custody in lieu of bail. His next court appearance is scheduled for Oct. 20, 2025, in Ventura County Superior Court.
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