Your Antioch Private Investigator for Surveillance and Investigations
Bear Witness is the private investigator in Antioch that families, attorneys, and businesses call when they need facts, not guesses. Antioch is a city of about 116,000 people in Contra Costa County. We are a veteran-owned, California-licensed firm (PI #18755), and surveillance is what we do best.
Our Antioch 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 Antioch Case
As a Antioch 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
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.
The average commute in Antioch is about 43 minutes, so work-related surveillance often means following a route, not waiting at one address.
Cases Our Antioch 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 — documenting where a partner goes and who they meet, without them knowing.
- Runaways & missing persons — finding someone who has left Antioch or stopped answering.
- Nanny & daycare surveillance — observing caregiver conduct and advising on what in-home recording is legal.
Family Law Cases
- Child support — identifying undisclosed work or income when support is in question.
- Child visitation — a factual record of exchanges and visits.
- Lifestyle investigations — documenting spending, activities, and lifestyle relevant to support claims.
- Child custody — documenting what happens during parenting time in and around Antioch.
- Cohabitation — documenting cohabitation that can affect spousal support under Family Code 4323.
- Divorce investigations — documentation that supports your attorney’s strategy.
Business Cases
- Insurance defense — surveillance and investigation for carriers and defense counsel.
- Business partner surveillance — due diligence and surveillance on partners and key associates.
- Workers’ comp fraud — surveillance on claims where activity and injuries don’t match.
- Employee theft — documenting internal theft and misconduct before you act.
- Injury claims — verifying the extent of claimed injuries through lawful observation.
Law Firm Cases
- Surveillance — time-stamped video and investigator reports for your case.
- Records research — public and court records research to support your case.
- Court testimony — our investigators testify to what they observed.
- Evasive subpoena service — serving witnesses and parties who are avoiding service.
- Evidence gathering — documentation built for the Superior Court of California, County of Contra Costa.
- Witness statements — locating witnesses and taking their statements.
The Bear Witness Difference in Antioch
Not every Antioch private investigator specializes in surveillance. Here is what makes Bear Witness different.
Absolute Discretion
Confidential from the first call; covert in the field.
Honest Results
If nothing is going on, we tell you. A clear answer is the goal, not more billable hours.
Available 24/7
Nights, weekends, holidays — we work when your subject is active.
Direct Access to Your Investigator
We limit our caseload, so you talk to the investigator working your case — not a call center.
Licensed & Veteran-Owned
A veteran-owned firm licensed by the California Bureau of Security and Investigative Services.
Court-Ready Evidence
Evidence gathered lawfully and documented the way California judges and attorneys expect.
What Our Clients Say
Real reviews from Bear Witness clients across California.
“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.”
“I first consulted with a few other investigation companies in the area, yet I remained skeptical about their service. But, after I talked over my case with James, I was pleased with the high levels of confidence and experience he conveyed. In the end, I am glad I chose Bear Witness to perform my surveillance investigation. Thanks for the video your company obtained. It was eye-opening.”
“Excellent communication, insight, and follow-through skills. Very impressed with your surveillance video. Excellent work. Thank you! Will refer to friends in need.”
Names and/or locations altered for client privacy. Read more client reviews →
Antioch Cases and the Contra Costa County Courts
Antioch sits roughly 17 miles from Martinez, the Contra Costa County seat, where the main Superior Court of California, County of Contra Costa facilities are located.
If your Antioch matter ends up in the Superior Court of California, County of Contra Costa, documentation quality decides whether the evidence helps. We keep chain-of-custody records and write reports in plain chronological order.
Also Serving Near Antioch
If your subject lives in Antioch but works or travels elsewhere, that’s routine. Nearby areas include:
Straight-line distances from Antioch.
How Hiring a Private Investigator in Antioch 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 Antioch 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 Antioch
Do you also cover Brentwood and Clayton?
Yes. Brentwood is about 5 miles from Antioch and Clayton about 8 miles, and both are part of our regular coverage in Northern California.
How far is Antioch from the Contra Costa County courthouse?
Antioch is roughly 17 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 Antioch 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 Antioch and across California.
Can you catch a cheating spouse in Antioch?
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.
Is everything I tell you confidential?
Yes. Your case is handled by your assigned investigator and never discussed with anyone outside the firm.
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.
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.
What if the investigation finds nothing?
You get an honest report that says so. A clean result still answers the question.
Every case starts with a free, confidential consultation. Call 1(877)PROOF-24/7 to speak with a licensed investigator about your Antioch case.