About Tristar Investigation
Trusted Private Investigators in California
for Over 40 Years
At Tristar Investigation, we’ve earned a reputation as one of California’s leading private investigation agencies. For over four decades, our licensed investigators have supported individuals, attorneys, insurers, and businesses with discreet, professional, and results-focused services. By combining experience, technology, and legal expertise, we uncover the facts that matter most.
Clients across California trust Tristar Investigation for results-driven investigative services.
Experienced
Professionals
Professionals
Decades of investigative expertise led by founder Bruce Robertson, featured in CNN, MSNBC, Court TV, and The New York Times. Our licensed investigators know how to uncover the truth with precision.
Comprehensive
Services
Services
From insurance defense and corporate investigations to family and private matters, our services are tailored to meet the unique needs of attorneys, businesses, and individuals.
Proven
Results
Results
Our track record speaks for itself. With thousands of cases handled, Tristar delivers actionable evidence, trusted by law firms, insurers, and corporations statewide.
Meet Bruce Robertson
Founder of Tristar Investigation
With over 40 years of investigative experience, Bruce Robertson has built Tristar into one of California’s most trusted private investigation firms. Known for his persistence, professionalism, and discretion, Bruce has been featured in national media, including the New York Times and Los Angeles Times. His expertise spans complex surveillance, legal investigations, and high-stakes corporate cases, making him a go-to resource for attorneys, insurers, and businesses seeking reliable answers.
The Story of Us
For more than 40 years, Tristar Investigation has been delivering trusted, results-driven investigative services across California.
Decades of Experience
You Can Rely On
Tristar Investigation has built a strong reputation as one of California’s most respected investigative agencies.
Led by Industry
Expert Bruce Robertson
Our founder has been featured on CNN, MSNBC, Court TV, and The New York Times, highlighting Tristar’s trusted investigative expertise.
Comprehensive Services
for Every Client
We provide tailored investigative solutions for attorneys, corporations, insurers, and individuals across a wide range of legal and personal matters.
Serving California
Statewide
With our office in Los Angeles, we bring local expertise with statewide reach to meet the needs of our clients.
What our Clients say About us
At Tristar Investigation, client trust is our greatest measure of success. For over 40 years, attorneys, corporations, and private individuals across California have relied on us for thorough, results-driven investigations. Here’s what some of our clients have to say about their experience working with us.
Tristar In The News
Stay updated with the latest from Tristar Investigation. 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.
