San Mateo County Authorities Arrest Subject for Alleged Possession of Ghost Guns, Fentanyl
Photo credit: San Mateo County Sheriff’s Office
SAN CARLOS, CA — “A 52-year-old San Carlos man was recently arrested in connection with possessing three unregistered and unserialized ‘ghost guns,’ numerous gun parts and fentanyl. The arrest followed an extensive investigation by the San Mateo County Sheriff’s Office Crime Suppression Unit.
Following up on a separate investigation, on October 19, 2026, detectives with the Sheriff’s Office Crime Suppression Unit obtained a search warrant signed by a Judge for a home in the 1700 block of Alameda De La Pulgas in San Carlos.
On October 23, 2026, detectives served the search warrant on the home and took the suspect into custody without incident following a nearby traffic stop.
During the investigation, detectives located 12 grams of suspected fentanyl, three unregistered and unserialized ‘ghost guns,’ including an AR-15, gun parts and drug packaging materials.
The suspect, 52-year-old Joshua A. Harris of San Carlos, is believed to have been manufacturing guns in the home. Harris does not have any firearms legally registered to him.
Harris was subsequently arrested and booked into the Maguire Correctional Facility for the following charges:
11352(B) HS – Transport/sell narc controlled substance between counties
11352(A) HS – Transport/sell narcotic/controlled substance
18720 PC – Make destructive device w/o permit
11370.1(A) HS – Poss controlled substance while armed w/loaded firearm
30605(A) PC – Illegally possess any assault weapon
29180(C) PC – Own firearm without serial number
Anyone with information is encouraged to contact the Sheriff’s Office at 650-363-4911. Anonymous tips can be made by calling 1-800-547-2700.”
