Experts in Litigation Support and Complex Investigations

Keystone Investigative Services, Inc. is a boutique investigative firm renowned for providing specialized investigations to Law Firms, Insurance Carriers and Corporations.  With over 35 years combined professional investigative experience, Keystone is at the forefront of experts in the field of legal investigations and insurance defense.  We specialize in providing a 360 ° perspective on legal matters through multi-faceted research and analysis.

Our Los Angeles corporate headquarters is located in beautiful Pasadena, California and we provide professional investigative services Nationwide.  We are a state-of-the-art investigative agency which leverages modern technology to obtain vital information for each unique case.

Keystone Investigative Services is dedicated to providing excellence in customer service and high quality information products.  We are pleased to offer tailored investigations based on your legal strategy for the specific nuances of each situation.

“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