Experts in Litigation Support and Complex Investigations

Keystone Investigative Services, Inc. is a premier investigative firm offering specialized services to Law Firms, Insurance Clients, Corporations and the Entertainment Industry.  We also provide services to private clients who are a party to a legal matter.  Keystone is at the forefront of experts in the field of legal investigations and insurance defense.

Our corporate headquarters is located in beautiful Pasadena, California and we provide investigative services Nationwide.  We are a state-of-the-art investigation agency which leverages modern technology to obtain vital information for each unique case. Keystone’s legal investigators are experts in research, analysis and data synthesis.  Our field team is through, savvy and resourceful.  Keystone Investigative Services is dedicated to providing excellence in customer service and high quality information products.

Keystone’s service structure allows for tailor-made investigations to obtain the specific information that you need.  We offer a hands-on approach with regards to investigation directives, depth and scope of research as well as budget.  With our renowned professional experience in the industry, skilled expertise and lean operating framework, we offer our clients an exclusive product with unsurpassed value.

“More of What You’re Looking For.”


Our legal investigators assist attorneys in the preparation of case matters by gathering…Read More


Keystone investigators are experts in insurance defense investigations…Read More

Corporations & Businesses

Our business and workplace investigations division works diligently to provide specialized…Read More