Jason Giannini, 23, and his passenger, 50-year-old Fred Heric of Santa Rosa, were both arrested following the stop, according to the Marin California Highway Patrol office.
The CHP said that at just after 10 a.m. Sunday a CHP officer made an enforcement stop for a gross polluter violation on a black 1991 Ford F-150 Giannini was driving southbound on US-101 on the Central San Rafael off-ramp.
The Ford allegedly had been emitting a large amount of black smoke as it was driving southbound US-101 with a pack of Hells Angels riders, the CHP reported.
During the course of the stop, CHP officers determined Giannini to be driving on a suspended license and impounded the vehicle, according to the report.
The CHP reported that while officers were searching the vehicle they found multiple switchblades, butterfly knives, brass knuckles and lead-weighted gloves, along with a loaded 9 millimeter pistol, loaded and expelled ammunition, a baton, counterfeit US currency and less than an ounce of marijuana.
Both Giannini and Heric of Santa Rosa were arrested and booked into Marin County Jail on misdemeanor charges of possessing a switchblade, a firearm with an obliterated serial number, a concealed firearm in a vehicle and a loaded firearm in a public place and felony possession of baton/metal knuckles, officials said.
The CHP said both Giannini and Heric will be charged with gang association enhancements.
In addition, Giannini faces a gross polluter infraction and a misdemeanor charge of driving on a suspended license, the CHP reported.
The Marin County Major Crimes Task Force will be assisting the CHP with the investigation.
Later that day, the CHP arrested a Novato man, 52-year-old David Cesena, who was taking place in the Hells Angels Memorial Ride after he failed to stop his motorcycle at the stoplight at the intersection the northbound US-101 off-ramp to San Marin Drive and Atherton Avenue.
During the search a CHP officer observed an out-of-place handle protruding from the handle bar/fork area of the 2003 Harley Davidson motorcycle. The CHP report said the item later was determined to be an ice pick designed to be concealed within the motorcycle.
Cesena subsequently was arrested for felony possession of a deadly weapon and several traffic infractions, including failure to stop at a red light, no insurance, improper display of license plates and expired registration.
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