A traffic stop can become a criminal case fast — especially a DUI stop.
You can protect yourself without escalating: comply physically, stay quiet, and don’t consent.
What to Do
- Pull over safely, turn on the interior light at night, and keep your hands visible on the wheel.
- Provide license, registration, and insurance when asked.
- Be polite. Courtesy costs nothing and keeps the encounter calm.
What Not to Do
- Don’t volunteer information — you do not have to say where you were or whether you had a drink. Politely stay silent.
- Don’t consent to a search of your car or phone. You can decline.
- Don’t physically resist, even an unlawful search or arrest — that can add a resisting charge. You fight it in court, not on the roadside.
After the Stop
If the stop led to a citation or an arrest, write down everything while it is fresh — why you were stopped, what was said, what happened. If the stop itself was unlawful (no reasonable suspicion), a motion to suppress (PC 1538.5) can challenge everything that followed. That is often the strongest defense in a DUI or drug case.
Frequently Asked Questions
What do I have to give police at a traffic stop?
When asked, provide your driver's license, vehicle registration, and proof of insurance. Beyond identifying yourself and your vehicle, you are not required to answer questions about where you were or what you were doing.
Do I have to consent to a search when pulled over?
No. You can politely decline: 'I don't consent to any searches.' Refusing is not a crime and does not give police probable cause. Do not physically interfere — challenge an unlawful search later with a motion to suppress.
Can I challenge a traffic stop that led to an arrest?
Yes. If the stop was not supported by reasonable suspicion, a motion to suppress under PC 1538.5 can challenge everything that followed — often the strongest defense in a DUI or drug case.
GuidesComplete Guide to California Misdemeanors · Glossary · Penalties Reference.
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If a stop turned into an arrest, the stop itself may be challengeable. Tell me what happened and I'll tell you.
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Ahmed S. Hasan
San Francisco Criminal Defense Attorney · State Bar of California #364992
Ahmed S. Hasan is the founder of ASH Legal, a solo criminal defense practice based in San Francisco. The firm runs on flat-fee representation: one lawyer, one fee, from arraignment through resolution. No hourly billing. No surprise invoices.
Ahmed is a graduate of Emory University School of Law and a member in good standing of the State Bar of California (Bar #364992). His practice focuses on San Francisco misdemeanor defense — DUI, domestic violence, petty theft and shoplifting, drug possession, vandalism, trespassing, and assault and battery — with particular attention to diversion-track outcomes that end in dismissal under PC 1001.95, PC 1001.36 (Mental Health Diversion), PC 1001.80 (Military Diversion), and PC 1001.83 (Parental Caregiver Diversion).
Ahmed previously served as a post-bar clerk with the San Francisco Public Defender's Office, the city's largest indigent-defense practice. He is a member of the Asian Pacific American Bar Association of Silicon Valley.
He represents clients at the San Francisco Hall of Justice (850 Bryant Street) and the Civic Center Courthouse. The ASH Legal office is at 15 Boardman Place, Suite 301, San Francisco, CA 94103.
Free 30-minute consultations are available by phone or Zoom. (510) 545-6515 · ahmed@ashlegal.com