Licensed Professional Investigations - CA. PI License #28059                    


Investigations • Research • Consulting

"Leadership and Experience that matters."

→ California licensed and insured private investigations agency serving Southern California. 

→ Staff investigators with backgrounds in law enforcement, investigations, and  law.  

 Extensive experience in surveillance, OSINT, civil, and family law investigations.

→ We utilize the latest P.I. methods, procedures and investigative equipment. 

Highly trained professionals in locating actionable evidence for legal cases.

All communications with our clients are confidential.

Marc A. Garza

Agency Owner

Meet Agency Owner, Marc A. Garza:

"I am honored to be regarded as an investigative resource for my clients. I know first-hand the level of expertise and care that's required to conduct concise and actionable legal investigations. I value my client's time, investment, and trust in me by providing investigations so they can make critical legal and business decisions with confidence. My team and I look forward to establishing new business relationships, and working closely with you to meet your investigative objectives. Feel free to contact me directly to discuss your investigative case."

Background and Professional Experience:

Marc A. Garza is a licensed private investigator and the agency owner of GRI Investigations. His agency focuses on complex investigations for private clients, law firms, corporate legal counsel and insurance companies. He has assisted legal counsel and their clients with investigations in numerous family law, civil litigation and felony criminal defense cases. In addition to conducting comprehensive investigations, he has testified in both civil and criminal cases. Previously, he served over 20 years as a law enforcement officer, retiring at the rank of police sergeant. He draws on that experience to offer his clients actionable private sector investigations through all phases of litigation in civil, criminal and family law matters. He is licensed in the State of California, under PI license #28059 and #189232.