Your Brentwood Private Investigator for Surveillance and Investigations
Bear Witness is the private investigator in Brentwood that families, attorneys, and businesses call when they need facts, not guesses. Brentwood is a city of about 65,000 people in Contra Costa 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 Brentwood investigators plan each case around the subject’s real routine and document it with time-stamped video.
Why Surveillance Is at the Heart of Every Brentwood Case
As a Brentwood 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.
The average commute in Brentwood is about 41 minutes, so work-related surveillance often means following a route, not waiting at one address.
Cases Our Brentwood Private Investigators Take On
Whatever the situation, the work comes down to documenting the facts lawfully and clearly.
Personal Cases
- Runaways & missing persons — finding someone who has left Brentwood or stopped answering.
- Nanny & daycare surveillance — observing caregiver conduct and advising on what in-home recording is legal.
- Infidelity & cheating spouse — a clear, factual answer for Brentwood clients who suspect a partner.
Family Law Cases
- Child visitation — a factual record of exchanges and visits.
- Divorce investigations — documentation that supports your attorney’s strategy.
- Child custody — facts that help a court decide what is best for your child.
- Child support — identifying undisclosed work or income when support is in question.
- Cohabitation — proof of a live-in partner when spousal support is at stake.
- Lifestyle investigations — what someone’s day-to-day life really looks like.
Business Cases
- Injury claims — documenting physical activity relevant to personal injury claims.
- Workers’ comp fraud — comparing a claimant’s real activity to reported restrictions.
- Insurance defense — claim investigations built for insurers and their attorneys.
- Employee theft — documenting internal theft and misconduct before you act.
- Business partner surveillance — due diligence and surveillance on partners and key associates.
Law Firm Cases
- Records research — court, property, business, and public records research.
- Court testimony — investigator testimony in California courts when needed.
- Evidence gathering — court-ready documentation for litigation.
- Evasive subpoena service — serving witnesses and parties who are avoiding service.
- Witness statements — locating witnesses and taking their statements.
- Surveillance — surveillance your client’s case can stand on.
What Sets Our Brentwood Investigators Apart
Not every Brentwood private investigator specializes in surveillance. Here is what makes Bear Witness different.
Direct Access to Your Investigator
We limit our caseload, so you talk to the investigator working your case — not a call center.
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.
Statewide Coverage
From Brentwood to the rest of California, we follow subjects wherever the case leads.
Available 24/7
Nights, weekends, holidays — we work when your subject is active.
Court-Ready Evidence
Time-stamped video, detailed reports, and investigator testimony that stand up in court.
What Our Clients Say
Real reviews from Bear Witness clients across California.
“I hired your detective agency to do a surveillance investigation in Orange County for a personal issue. I found your company to be professional & very helpful. Thank you for the updates, insight, and information you provided. You guys did a good job and I will recommend your private investigator company to others.”
“Thank you for getting me the information I needed to make a smart life-altering decision. I had a weird feeling my fiance was seeing another woman. But, your company got me the hard proof. And you got it fast. Many thanks to your private investigators! You saved me from making a big mistake.”
“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.”
Names and/or locations altered for client privacy. Read more client reviews →
Brentwood Cases and the Contra Costa County Courts
Brentwood sits roughly 22 miles from Martinez, the Contra Costa County seat, where the main Superior Court of California, County of Contra Costa facilities are located.
Divorce, custody, support, and civil cases involving Brentwood residents are generally filed in the Superior Court of California, County of Contra Costa. We document every case with that courtroom in mind: dated, time-stamped, gathered legally, and backed by testimony if needed.
About 82% of Brentwood households own their homes. Stable, quiet neighborhoods mean residents notice unfamiliar cars, so residential surveillance here takes careful positioning.
Nearby Areas We Cover
If your subject lives in Brentwood but works or travels elsewhere, that’s routine. Nearby areas include:
Straight-line distances from Brentwood.
How Hiring a Private Investigator in Brentwood 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 Brentwood 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 Brentwood
Do you also cover Antioch and Discovery Bay?
Yes. Antioch is about 5 miles from Brentwood and Discovery Bay about 7 miles, and both are part of our regular coverage in Northern California.
How far is Brentwood from the Contra Costa County courthouse?
Brentwood is roughly 22 miles (straight-line) from Martinez, the Contra Costa County seat, where the main Superior Court of California, County of Contra Costa facilities are. Some matters are heard at branch courthouses; your attorney can confirm the location.
What does a private investigator in Brentwood 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 Brentwood 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.
Do I need to meet in person?
No. Most Brentwood clients handle everything by phone, from the first call to the final report.
How is a Brentwood investigation priced?
Surveillance is billed by time. After a free consultation, you get a written estimate before any billable work begins.
Do you work with Contra Costa County attorneys?
Yes. Law firms use us for evidence gathering, surveillance, witness statements, records research, evasive subpoena service, and court testimony.
Do you handle workers’ compensation and insurance claims?
Yes. We conduct claimant surveillance and claim investigations for employers, insurers, and defense counsel.
Every case starts with a free, confidential consultation. Call 1(877)PROOF-24/7 to speak with a licensed investigator about your Brentwood case.