Fairfax Private Investigator Services, Built Around Surveillance
Bear Witness is the private investigator in Fairfax that families, attorneys, and businesses call when they need facts, not guesses. Fairfax is a town of about 7,500 people in Marin County. We are a veteran-owned, California-licensed firm (PI #18755), and surveillance is what we do best.
Our Fairfax clients include individuals facing infidelity or a missing family member, parents in custody and support disputes, employers and insurers dealing with fraud, and law firms that need evidence and testimony. What they share is a need for discreet, lawful surveillance that holds up.
Why Surveillance Is at the Heart of Every Fairfax Case
As a Fairfax 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
Experienced drivers who anticipate turns and freeway exits, so your subject is documented from stop to stop.
Static Surveillance
We hold position at the locations that matter to your case and record activity with time-stamped video.
Two-Investigator Teams
For careful or unpredictable subjects, two investigators trade off so the same car is never seen twice.
Every Fairfax surveillance plan is built around where your subject actually lives, works, and spends time — not a generic template.
What Our Fairfax Private Investigators Handle
Four kinds of clients call us most — and surveillance is at the center of almost every case.
Personal Cases
- Infidelity & cheating spouse — a clear, factual answer for Fairfax clients who suspect a partner.
- Nanny & daycare surveillance — observing caregiver conduct and advising on what in-home recording is legal.
- Runaways & missing persons — locating family members and loved ones who have left or lost touch.
Family Law Cases
- Lifestyle investigations — documenting spending, activities, and lifestyle relevant to support claims.
- Child support — identifying undisclosed work or income when support is in question.
- Cohabitation — documenting cohabitation that can affect spousal support under Family Code 4323.
- Divorce investigations — facts and evidence your family law attorney can use.
- Child visitation — documenting visitation exchanges and compliance with the court order.
- Child custody — parenting-time compliance, home conditions, and welfare concerns.
Business Cases
- Injury claims — showing what a claimant can really do.
- Business partner surveillance — due diligence and surveillance on partners and key associates.
- Insurance defense — surveillance and investigation for carriers and defense counsel.
- Employee theft — documenting internal theft and misconduct before you act.
- Workers’ comp fraud — documenting claimant activity across Marin County.
Law Firm Cases
- Evidence gathering — documentation built for the Superior Court of California, County of Marin.
- Records research — the records behind the story.
- Evasive subpoena service — skip-tracing and service for hard-to-serve subjects.
- Court testimony — investigator testimony in California courts when needed.
- Witness statements — locating witnesses and taking their statements.
- Surveillance — time-stamped video and investigator reports for your case.
Why Fairfax Clients Choose Bear Witness
Not every Fairfax 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.
Honest Results
If nothing is going on, we tell you. A clear answer is the goal, not more billable hours.
Statewide Coverage
From Fairfax to the rest of California, we follow subjects wherever the case leads.
Licensed & Veteran-Owned
A veteran-owned firm licensed by the California Bureau of Security and Investigative Services.
Absolute Discretion
Confidential from the first call; covert in the field.
Direct Access to Your Investigator
We limit our caseload, so you talk to the investigator working your case — not a call center.
What Our Clients Say
Real reviews from Bear Witness clients across California.
“Wow. Outstanding job! I really did get lucky when I picked you guys. I don’t think any other private investigator could have handled my case better than you did. Very on top of your game, from start to finish. Excellent work!”
“Thank you for all your help. You guys were really great! I will definitely refer your private detective agency to all my friends & colleagues in need.”
“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.”
Names and/or locations altered for client privacy. Read more client reviews →
Where Fairfax Cases Are Heard
Fairfax sits roughly 5 miles from San Rafael, the Marin County seat, where the main Superior Court of California, County of Marin facilities are located.
Divorce, custody, support, and civil cases involving Fairfax residents are generally filed in the Superior Court of California, County of Marin. We document every case with that courtroom in mind: dated, time-stamped, gathered legally, and backed by testimony if needed.
Nearby Areas We Cover
Cases rarely stay inside one city limit. From Fairfax, we regularly work:
Straight-line distances from Fairfax.
Working With a Fairfax Private Investigator, Step by Step
- 1
Call Us
A short, private conversation about your situation, with no obligation.
- 2
Strategy
We decide when and where surveillance in and around Fairfax 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.
Questions About Hiring a Private Investigator in Fairfax
Do you also cover San Anselmo and Ross?
Yes. San Anselmo is about 1 mile from Fairfax and Ross about 3 miles, and both are part of our regular coverage in Northern California.
How far is Fairfax from the Marin County courthouse?
Fairfax is roughly 5 miles (straight-line) from San Rafael, the Marin County seat, where the main Superior Court of California, County of Marin facilities are. Some matters are heard at branch courthouses; your attorney can confirm the location.
What does a private investigator in Fairfax 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 Fairfax and across California.
Can you help find a runaway or missing person?
Yes. We use people-location and investigative techniques to find family members and others who have left or lost touch.
Can you document cohabitation for a spousal support case?
Yes. Under California Family Code section 4323, a supported spouse living with a partner can create a presumption of decreased need for support. We document cohabitation for you and your attorney.
How do I verify your license?
Look up PI License #18755 on the California Department of Consumer Affairs license search.
How is a Fairfax investigation priced?
Surveillance is billed by time. After a free consultation, you get a written estimate before any billable work begins.
Can you catch a cheating spouse in Fairfax?
We can document what your spouse actually does and who they meet, with time-stamped video and a written report, and give you a clear answer either way.
Ready to talk to a private investigator in Fairfax? Call 1(877)PROOF-24/7 for a free, confidential consultation.