About Tristar Investigation
A Trusted Private Detective Agency in California for Over 40 Years
At Tristar Investigation, we’ve built our reputation as one of the most respected private investigation companies in California. For more than three decades, we have provided individuals, attorneys, insurers, and businesses with discreet, professional, and results-driven investigative services. Our team of licensed private investigators in California combines experience, technology, and legal precision to uncover the truth.
Most Trusted Services in California
Trusted Statewide
We provide specialized investigative and legal support for attorneys, businesses, insurers, and individuals. Our top services focus on the areas where we deliver the greatest impact, uncovering fraud, locating witnesses, protecting assets, and keeping legal cases on track. With decades of proven results, these six services are the foundation of why clients across California trust us.
Services Offered
Comprehensive Investigations Tailored to Your Needs
We offer a wide range of professional investigative services, tailored to meet the unique needs of individuals, families, businesses, attorneys, and insurers.
Cheating Spouse
Discover the truth with discretion. Our investigators provide clear evidence of infidelity or confirm suspicions, giving you peace of mind to move forward with confidence.
Check on Someone’s Past
Background checks reveal the truth about a person’s history. From criminal records to employment verification, we provide accurate reports to help you make safe, informed choices.
Find Someone
Whether reconnecting with a lost relative, locating a witness, or tracking down a missing person, our team combines databases, interviews, and fieldwork to find the people who matter most.
Estate & Probate
Our estate and probate investigations verify heirs, uncover hidden assets, and resolve disputes, providing attorneys with clarity in complex legal cases.
Divorce
Divorce cases often require solid evidence. We gather documentation on finances, hidden assets, or misconduct to support your case and ensure a fair legal outcome.
Spouse/Domestic Surveillance
We deliver reliable surveillance to uncover hidden behavior in relationships or domestic matters. With clear, court-ready documentation, you’ll have the facts you need to make informed decisions.
Injury Surveillance
From workplace incidents to personal injury claims, we document claimant activities with video and reports that verify or disprove alleged injuries.
Workers Comp Fraud Subrosa
We expose exaggerated or fraudulent workers’ compensation claims by gathering reliable surveillance and investigative findings that protect employers and insurers.
Insurance Accident Investigations
Our team conducts thorough accident investigations, collecting witness statements, photos, and documentation to clarify liability and support fair outcomes.
Bilingual Claims Investigator
With Spanish and English-speaking investigators, we ensure no detail is lost in translation, delivering accurate evidence and statements for bilingual insurance cases.
Worker Compensation AOE – COE Investigations
We investigate workplace injury claims to determine both arising out of employment (AOE) and course of employment (COE) validity, protecting insurers from false or exaggerated claims.
Skip Tracing
Our investigators locate hard-to-find individuals using databases, records, and fieldwork, helping insurers, attorneys, and businesses move claims forward with confidence.
Business Surveillance
We provide discreet corporate surveillance to uncover fraud, misconduct, and risks that threaten your business. Our licensed investigators deliver reliable evidence that protects your assets and reputation.
Workers Comp Fraud Investigations
We expose exaggerated or false workers’ compensation claims through thorough surveillance and documentation.
Loss Prevention
Our loss prevention investigations expose fraud, collusion, and organized theft schemes, helping businesses reduce losses and maintain operational integrity.
Intellectual Property
Our investigators protect your business from IP theft, counterfeit goods, and trade secret leaks by gathering actionable intelligence and evidence.
Employee Theft
We investigate internal theft cases with precision, uncovering employee misconduct and safeguarding your company’s assets, finances, and reputation.
Asset Investigations
We trace business assets, verify ownership, and uncover hidden holdings, providing clarity for litigation, mergers, and financial decision-making.
Tristar In The News
Stay updated with the latest from Tristar Investigations. Our news and insights highlight real cases, industry trends, and investigative breakthroughs. From high-profile media coverage to practical tips for attorneys and businesses, we share updates that matter.
Featured On:
Service Areas
We Serve All of California
Our licensed investigators provide trusted support across California, delivering professional results for individuals, businesses, attorneys, and insurers statewide.
Los Angeles
San Diego
San Jose
Oakland
Long Beach
Fresno
Alameda County
Sacramento
San Francisco
Anaheim
Bakersfield
Santa Clara County
San Bernardino
Riverside County
Glendale
Beverly Hills
Chula Vista
Santa Ana
Irvine
Newport Beach
The Tristar Latest Blogs
Stay informed with expert insights from Tristar Investigation. Our blogs cover real investigative strategies, case studies, and legal perspectives to help clients, attorneys, and businesses make better decisions.
What Our Clients Say About Us
For over three decades, clients across California have trusted Tristar Investigation for discreet, professional, and results-driven services. From individuals and families to attorneys, insurers, and corporations, our private investigators in California are praised for their confidentiality, accuracy, and dedication to uncovering the truth.
Need Confidential Help? Request a Free Consultation
Your case will be handled discreetly by licensed California investigators.