About

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 three 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.

Some key reasons clients across California trust Tristar Investigations for results-driven investigative services.

Experienced
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

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

Our track record speaks for itself. With thousands of cases handled, Tristar delivers actionable evidence, trusted by law firms, insurers, and corporations statewide.

Some key reasons clients across California trust Tristar Investigations for results-driven investigative services.

Experienced 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

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

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 Investigations 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 offices in Los Angeles and San Francisco, we bring local expertise with statewide reach to meet the needs of our clients.

What our Clients say About us

At Tristar Investigations, 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.

There is no such thing as a dead end for Bruce or his staff at Tri-Star. When others come up short, Bruce gets it done.

If you want it done on time, done right the first time, and done well, Tristar is the one to call.

There is no such thing as a dead end for Bruce or his staff at Tri-Star. When others come up short, Bruce gets it done.

When your need is the greatest and time is of the essence, Tristar is the only Investigative Service you can truly rely on to get the job done.

Call Us Today

(310) 390-0947

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.

Trusted Private Investigators in California
for Over 40 Years

Some key reasons clients across California trust Tristar Investigations for results-driven investigative services.