Your Sonoma Private Investigator for Surveillance and Investigations
Bear Witness is the private investigator in Sonoma that families, attorneys, and businesses call when they need facts, not guesses. Sonoma is a city of about 11,000 people in Sonoma County. We are a veteran-owned, California-licensed firm (PI #18755), and surveillance is what we do best.
Whether you suspect a cheating spouse, need evidence for a custody or support case, are dealing with a questionable workers’ compensation claim, or represent a client who needs court-ready surveillance, our Sonoma investigators plan each case around the subject’s real routine and document it with time-stamped video.
Sonoma Surveillance Investigations: Our Specialty
As a Sonoma private investigator, surveillance is the core of what we do. We document activity legally, discreetly, and in a way that holds up in court.
Mobile Surveillance
We follow the subject by vehicle through Sonoma and beyond, keeping distance and cover so they never know we are there.
Static Surveillance
Discreet observation of a home, workplace, or business from a lawful public vantage point, documenting who comes and goes.
Two-Investigator Teams
Team surveillance covers multiple exits and keeps a moving subject in sight in heavy Northern California traffic.
Every Sonoma surveillance plan is built around where your subject actually lives, works, and spends time — not a generic template.
Cases Our Sonoma Private Investigators Take On
Four kinds of clients call us most — and surveillance is at the center of almost every case.
Personal Cases
- Infidelity & cheating spouse — discreet surveillance that gives you a clear answer, either way.
- Runaways & missing persons — finding someone who has left Sonoma or stopped answering.
- Nanny & daycare surveillance — documenting how a caregiver treats your child, within California privacy law.
Family Law Cases
- Child visitation — a factual record of exchanges and visits.
- Divorce investigations — facts and evidence your family law attorney can use.
- Cohabitation — proof of a live-in partner when spousal support is at stake.
- Child custody — parenting-time compliance, home conditions, and welfare concerns.
- Lifestyle investigations — what someone’s day-to-day life really looks like.
- Child support — identifying undisclosed work or income when support is in question.
Business Cases
- Business partner surveillance — answers before you sign or after trust breaks down.
- Workers’ comp fraud — surveillance on claims where activity and injuries don’t match.
- Injury claims — showing what a claimant can really do.
- Insurance defense — surveillance and investigation for carriers and defense counsel.
- Employee theft — quietly confirming suspected theft so you can respond with facts.
Law Firm Cases
- Records research — court, property, business, and public records research.
- Evasive subpoena service — service on people who don’t want to be found.
- Witness statements — finding and interviewing the people who saw what happened.
- Court testimony — our investigators testify to what they observed.
- Surveillance — time-stamped video and investigator reports for your case.
- Evidence gathering — court-ready documentation for litigation.
The Bear Witness Difference in Sonoma
Not every Sonoma private investigator specializes in surveillance. Here is what makes Bear Witness different.
Court-Ready Evidence
Evidence gathered lawfully and documented the way California judges and attorneys expect.
Surveillance Specialists
We specialize in surveillance, so your case gets investigators who do this every day.
Honest Results
We report what we observed — no stretching thin evidence to justify a case.
Available 24/7
Nights, weekends, holidays — we work when your subject is active.
Direct Access to Your Investigator
One investigator from your first call to your final report, with updates along the way.
Statewide Coverage
From Sonoma to the rest of California, we follow subjects wherever the case leads.
What Our Clients Say
Real reviews from Bear Witness clients across California.
“Of all the private investigators I have used, the Bear Witness Detective Agency has proven to be the only investigation company I can completely rely on and trust. When I need smart surveillance investigators who get the job done right, they are always at the very top of my call list.”
“I can’t believe you got the evidence so quickly! Something that had been bothering me for 2 years was put to rest after one day of your surveillance. I finally have the truth in my hands and can move on with my life now.”
“James, thank you for stepping in and helping out our law firm! You came highly recommended to us by a colleague as the go-to-guy for all things surveillance. Good communication skills & excellent work!”
Names and/or locations altered for client privacy. Read more client reviews →
Sonoma Cases and the Sonoma County Courts
Sonoma sits roughly 17 miles from Santa Rosa, the Sonoma County seat, where the main Superior Court of California, County of Sonoma facilities are located.
If your Sonoma matter ends up in the Superior Court of California, County of Sonoma, documentation quality decides whether the evidence helps. We keep chain-of-custody records and write reports in plain chronological order.
Also Serving Near Sonoma
Cases rarely stay inside one city limit. From Sonoma, we regularly work:
Straight-line distances from Sonoma.
How Hiring a Private Investigator in Sonoma Works
- 1
Call Us
A short, private conversation about your situation, with no obligation.
- 2
Strategy
We decide when and where surveillance in and around Sonoma is most likely to answer your question.
- 3
Fieldwork
One investigator handles your case from start to finish.
- 4
Results
Documented findings in plain language — including a clear “nothing found” when that is the truth.
Sonoma Private Investigator FAQs
Do you also cover Napa and Yountville?
Yes. Napa is about 9 miles from Sonoma and Yountville about 9 miles, and both are part of our regular coverage in Northern California.
What does a private investigator in Sonoma do?
We document facts for personal, family law, business, and legal cases — most often through surveillance, along with background research, people location, witness statements, and process serving.
Do you specialize in surveillance?
Yes. Surveillance has been Bear Witness’s specialty since 1996, and it is part of nearly every case we handle in Sonoma and across California.
How do I verify your license?
Look up PI License #18755 on the California Department of Consumer Affairs license search.
Is surveillance legal in Sonoma?
Yes, when done correctly. California allows observation in public places where there is no reasonable expectation of privacy. Our investigators do not trespass, use hidden vehicle trackers, or record private conversations.
Do I need to meet in person?
No. Most Sonoma clients handle everything by phone, from the first call to the final report.
Do you handle workers’ compensation and insurance claims?
Yes. We conduct claimant surveillance and claim investigations for employers, insurers, and defense counsel.
Do you work with Sonoma County attorneys?
Yes. Law firms use us for evidence gathering, surveillance, witness statements, records research, evasive subpoena service, and court testimony.
What if the investigation finds nothing?
You get an honest report that says so. A clean result still answers the question.
Ready to talk to a private investigator in Sonoma? Call 1(877)PROOF-24/7 for a free, confidential consultation.