About Us

Top Dog Private Investigators, LLC

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About us

With over 35 years of experience since our establishment in 1986 and having successfully handled over 5000 cases, Top Dog Private Investigators stands as a pillar of expertise and reliability in the investigative industry. Our unwavering commitment to excellence and dedication to revealing the truth has solidified our reputation as the top choice for investigative services in California.

Dive into our world of professionalism, expertise, and discretion — your top choice for investigative services in California.

Get a Quote 951-347-1063

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Our Story

Top Dog Private Investigators, LLC, is one of the top investigative firms in the Southern California region, with a combined 35 + years of experience, and literally thousands of successful investigations. We are members of multiple national and international investigative organizations; with our extensive networking, we are able to offer prompt, professional claims services nationally and internationally.

Our founder and president is Paul Mason, CPI. Mr. Mason brings many, many years of claims investigations services experience to the position. He is completely fluent in Spanish and English. Mr. Mason is a Qualified Investigations Manager, handling claims and SIU matters in addition to coaching members of his team and training other investigators.

A master, energetic surveillance investigator, Mr. Mason has worked thousands of surveillance matters in six states, and is independently licensed in California and Colorado.* His surveillance expertise broaches worker’s compensation; auto PI; and SIU matters. Discreet and professional, Mr. Mason has assisted many individuals with their domestic surveillance matters, as well.

Mr. Mason furthermore brings extensive claims experience, mastering a broad range of difficult claims matters: from minor fender benders; to slip and falls; to auto fatalities; to complex worker’s compensation matters; to difficult property damage claims.

Mr. Mason is also conversant with all aspects of civil process, having appeared at depositions, mediations, arbitrations, and small claims hearings, in addition to monitoring full trials. A fully certified and experienced Title IX investigator, Mr. Mason can help your organization or governmental entity maneuver the complexities of a Title IX investigation.

Mr. Mason is active in the local and statewide investigator community, currently serving as Emeritus Governor to the Inland Empire chapter of the California Association of Licensed Investigators (CALI). He reads, writes, and speaks Spanish fluently, and has a Licenciatura en Derecho degree from Universidad Vasco de Quiroga in Morelia, Michoacan.

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Explore Our Affiliations

  • California Association of Licensed Investigators (CALI)

  • Texas Association of Licensed Investigators (TALI)

  • Florida Association of Licensed Investigators (TALI)

  • Anti-Fraud Alliance (AFA)

  • California Certified Private Investigator (CPI)

  • Professional Private Investigators Association of Colorado (PPIAC)

These affiliations reflect our commitment to upholding industry standards and delivering exceptional investigative services.

Ready to uncover the truth?

Work with our team today!