M.W. Thompson Investigative Services:
Private Investigator in Sacramento, CA
At M.W. Thompson Investigative Services, we provide discreet, reliable, and results-driven investigative services to individuals, businesses, attorneys, and insurance companies throughout Sacramento, CA, and the surrounding areas. We have built our reputation on thorough research, professional insight, and an unwavering commitment to uncovering the truth. So whether you’re facing a personal matter, a legal dispute, or a complex corporate issue, we have the expertise and resources to get you answers.
Trusted Private Investigator Since 1996
Our founder and chief investigator, Matt Thompson, began his investigative career in 1996. Having previously served as a Criminal Investigator for the San Francisco Public Defender’s Office, Matt brings extensive courtroom and field experience to every case. Today, as a licensed private investigator (CA PI #24051) he leads our firm’s investigative services with the same dedication, precision, and discretion that clients have trusted for years.
Our Services

Surveillance Services
Surveillance is one of the most effective tools in private investigation, as well as one of our specialties. With decades of surveillance experience, we use advanced equipment and careful strategy to monitor activity without detection. Our surveillance services support cases involving infidelity, child custody disputes, insurance fraud and workers’ compensation claims. We deliver clear, documented results that hold up in court and provide peace of mind in sensitive situations.

Infidelity & Child Custody
Personal cases require discretion, empathy, and thoroughness. We offer infidelity investigations to help clients facing uncertainty in their relationships. By combining surveillance with investigative research, we deliver factual, unbiased reports so you can make informed decisions. For child custody investigations, we focus on the safety and well-being of the child, gathering the documentation and evidence courts often require to support custody decisions.

Locating People and Assets
Few investigators in Northern California can match Matt Thompson’s track record in locating individuals. Over the years, he has successfully found countless persons, witnesses, and debtors, even in cases where others had failed. Our team uses a wide range of investigative methods to track down individuals across Sacramento, across the state and across the nation. In addition to locating people, we also perform asset searches to uncover property, financial holdings, and other resources relevant to legal or personal cases.

Background Checks Nationwide
In today’s world, reliable information is critical. We provide detailed background checks nationwide for both individuals and organizations. Whether you’re an employer hiring a new staff member, a landlord screening a tenant, or someone preparing for a personal or legal matter, we uncover the facts you need. Our reports go far beyond surface-level information, drawing on state-of-the-art databases and investigative techniques to ensure accuracy and clarity.

Workers’ Compensation & Insurance
Fraudulent claims cost businesses and insurance companies billions of dollars each year. We provide professional workers’ compensation investigations and insurance investigations to uncover fraudulent activity. From covert surveillance to verifying claims, we provide the evidence necessary to protect your company’s resources and resolve disputes efficiently.

Criminal and Civil Investigations
With a strong background in criminal defense, Matt Thompson continues to work with attorneys throughout Sacramento County and throughout the state. He brings experience investigating criminal cases, gathering evidence, and interviewing witnesses. In civil matters, our investigations support attorneys and individuals with documentation, surveillance, and fact-finding that can significantly influence case outcomes.
Why Choose M.W. Thompson Investigative Services?
Choosing a private investigator is an important decision, and we recognize the trust our clients place in us. Here’s why Sacramento residents and organizations continue to rely on us:
- Experience Since 1996: Investigative work in both private and public sectors.
- Professional Credentials: Licensed in California since 2004.
- Proven Results: A reputation for successfully locating individuals and delivering actionable evidence.
- Discretion and Integrity: Sensitive cases handled with the highest level of confidentiality.
- Local and Statewide Reach: Serving Sacramento County, the surrounding areas and with the ability to extend services throughout California through trusted associates.
Serving Sacramento
and Surrounding Communities
Our office is located in Sacramento, but our services extend across Placer County, Yolo County, El Dorado County, and San Joaquin County. Whether you need surveillance in Roseville or asset searches in Elk Grove, we are equipped to handle cases across the region. Sacramento is home to a diverse community with unique needs, and our local knowledge helps us serve clients more effectively.
Areas Served
Sacramento, Roseville, Rocklin, Granite Bay, Folsom, El Dorado Hills, Davis, West Sacramento, Elk Grove, Natomas, Rancho Cordova.
Get the Answers You Deserve
At M.W. Thompson Investigative Services, our mission is to uncover the truth and deliver results you can rely on. With our extensive experience, advanced tools, and commitment to integrity, we are Sacramento’s trusted choice for private investigation. From background checks nationwide to surveillance across Northern California, we provide comprehensive services for criminal defense, insurance investigations, and personal matters, ensuring clarity and peace of mind. So if you need a private investigator you can trust, schedule a consultation today. Let us put our experience to work for you. Because when the answers matter, experience matters most.