Bruce Robertson is the founder of Tristar Investigation, a private detective agency in Los Angeles, CA. Tristar has a 28-year track record of delivering quality investigative results. Headquartered in West Los Angeles, Tristar has branch offices in San Francisco. If you need private detective services anywhere in the USA, contact the nationally known investigation experts at Tristar Investigation.


As a Private Investigator, Bruce Robertson is a nationally recognized expert and commentator in the field of investigation. His appearances on television include CNN Worldwide, MSNBC “Dayside”, Court TV’s “Catherine Crier Live”, History Channel’s “Modern Marvels”, and CNBC “Business Tonight”. Other appearances include KCET’s “Life and Times”, KCRW’s “Which Way L.A. ?” with Warren Olney, KUSC “Market Place” and numerous otherprograms and radio stations. He has been featured in print media such as The New York Times, the San Francisco Chronicle and the Los Angeles Times.

Tristar in New York TimesIn 2009 private detective and Tristar Investigation founder Bruce Robertson was hired to track down the person who shot two endangered California Condors.  This was the first time a private eye had been assigned to this type of case.  The story was featured in the New York Times and numerous other publications throughout the U.S, including the Los Angeles Times and San Francisco Chronicle.  NY Times – Robertson

Bruce Robertson Tristar Press

Bruce Robertson’s writings and opinions have been published in The Advocate, the magazine of the Consumer Attorneys Association of Los Angeles. He has been quoted in numerous publications including The New York Times, U.S. News and World Reports, George Magazine, the Los Angeles Times, the Daily News, and Ladies Home Journal.

Mr. Robertson has conducted major trial investigations for many of the premiere law firms in California, including Girardi & Keese, Panish, Shea & Boyle, Masry & Vititoe, Grassini & Wrinkle, Taylor & Ring, LLP, Biren & Katzman, McNicholas & McNicholas and Mardirossian & Associates.

Tristar Professional Organization Membership

Mr. Robertson is a member of the National Association of Legal Investigators (NALI), California Association of Licensed Investigators (CALI), Professional Investigators of California (PICA), National Council of Investigation and Security Services (NCISS) and the National Association of Investigative Specialists (NAIS). He has been a lecturer on investigative matters for the Consumer Attorneys Association (CAALA) in their Continuing Education Seminar Series and for the National Business Institute (NBI).

What people are saying

Thank you for providing me with such outstanding service. I truly appreciate you and your staff for all you’ve done for me and my family…. I’m totally pleased with the outcome and their findings… Great job!

Gerome S. | Retired | USA

I have used Tristar for years. Their response time and results are unparalleled. They get my highest praise.

Robert Clayton, Attorney | Taylor & Ring, LLP | Los Angeles, CA

Tristar found my birth mothers records the same day. I am very impressed with their professionalism and the services they provide. I will use them again for any of my needs.

Dr. Claudia Barne | Professor | 23 years

Tristar was very helpful in my address search. Kellie Anguiano was very personable and kept me up to date with the search process… Thank you so much for your help!

Emily | DDS Student | 2 years | Los Angeles, CA

Tristar is by far the most reliable and efficient investigator we have ever used.

Nicole Young | Attorney, 14 years | Woodland Hills, CA

Tristar in the news

Tristar Investigation has been featured in a dozens of publications, everything from print to TV and radio. Bellow you will find Burce Robertson interviewed and discussed on famous publications such as the History Channel, New York Times, CNN and a lot more.