What started as a routine overnight traffic stop in Foster City ended with two people in jail and a gun, a loaded high‑capacity magazine, and roughly 400 grams of marijuana packaged for sale, according to police. Nightshift officers say the driver was arrested on suspicion of driving under the influence and, the department said, is a convicted felon. The passenger was taken into custody on an outstanding DUI warrant, and both were booked into jail.
In a Facebook post, the Foster City Police Department says nightshift officers pulled the vehicle over for a routine stop and observed signs of alcohol and marijuana impairment before the driver refused standardized field sobriety tests and was arrested for DUI, according to the Foster City Police Department. During the investigation, officers located a gun that they say the driver had discarded and recovered a loaded high‑capacity magazine. The post adds that officers found packaging materials and scales consistent with narcotics sales and estimated there were about 400 grams of marijuana inside the vehicle.
Legal implications
Because the department said the driver is a convicted felon, firearm possession could bring felony charges under state law. California law bars people with felony convictions from possessing firearms, per California Penal Code §29800, and makes possession of large‑capacity magazines an offense under Penal Code §32310. The DUI allegation is governed by California’s drunk and drugged driving statutes, summarized by FindLaw, which covers Vehicle Code §23152 and related offenses.
Peninsula enforcement pattern
The Foster City stop comes amid a string of Peninsula traffic investigations that have turned up sizable drug and weapons hauls. For example, Redwood City police said a June 9 traffic stop led to the seizure of about 20 pounds of methamphetamine and multiple arrests, as reported by CBS San Francisco, and Hoodline has reported other local traffic‑stop busts involving fentanyl. Local law enforcement agencies have increasingly pointed to roadside enforcement as one way to disrupt street‑level trafficking.
The department’s Facebook post did not identify the individuals by name or indicate whether additional charges would be filed; those details were not included in the message. Further information may be available from Foster City Police or county booking records as the case moves forward.
