"Client Focused Investigations."

Our clients—attorneys, law firms, and individuals—trust us to deliver thorough, reliable investigations. Testimonials highlight how our work has made a difference in high-stakes cases across civil litigation, criminal defense, and family law matters.

Adam Hepburn, Partner

HHJ Trial Attorneys

“Marc Garza is the absolute best. I have worked with many investigators all throughout the state, and Marc is the top among all of them. He is quick, responsive, tenacious, and talented at what he does. He has worked on many cases for us, some of them very difficult to track down or find witnesses, but he has always come through for us. He is our go-to investigator and I highly recommend him."

Jim Hayes, Esq.

Hayes Law

"I am a personal injury lawyer here in San Diego. My firm utilizes GRI Investigations on a regular basis....Marc and his team are extremely thorough in their investigation, professional, responsive, and of equal importance, they always get the job done! Not all professional/private investigators are created equal, believe me I know, I’ve used too many to count in the past. Marc and his team are the real deal and you will not regret using GRI, whatever your needs may be. I honestly cannot recommend them enough!"

Jose Orozco, Esq.

Orozco Law Firm

“Marc and his team are professional and results oriented. I have used him many times on my criminal defense cases. Highly recommended..”

Chris Jevsesar, Esq.

Osprey Law

“Marc is great. I am an employment attorney based in Carlsbad......He's always responsive and efficient, priced fairly, would highly recommend."

Shelby Cardoza

Director of Legal Operations

HHJ Trial Attorneys

“Marc at GRI Investigations handles all of our difficult investigations. Marc is efficient, responsive and successful with all of our requests. HHJ Trial Attorneys highly recommends GRI Investigations."

Ed Perez, Esq.

Law Offices of Ed Perez

"My law firm has used Mr. Garza exclusively for the last 3 years. His experience as a former police officer really sets him apart from other private investigators. When we have a problem and do not know how to proceed he has been able to come up with clever solutions that have saved us time and money."

Matthew Pare, Esq.

Law Offices of Matthew Pare

“I am a local attorney in Chula Vista and used GRI Investigations to help locate a person and they did amazing work. The service provided was very prompt and they were able to find the exact information that we needed.”

Michael Keith, CEO

Cal Coast Pest Management

“As a business owner it is important to have the right team members. So in order to do that we have to make sure that our potential team members have a reasonable history and reliable source. We used GRI Investigations to support us by doing a thorough back ground check as well as checking DMV records. They definitely delivered!! Everything came back great in a timely manner! I will definitely be using GRI Investigations for future background check and any other services that they provide that I may need!!"

Steven Garrett

Private Client

"If you are looking for a thorough knowledgeable, very experienced, Private investigator that will take the time to listen very carefully and patiently to your problem or situation, Marc Garza is who you want to deal with and hire. In my case, I called him about a situation in which I thought he could help and he thoroughly helped me understand the legal implications and every other facet by speaking to me several times on the phone....I'm grateful for his advice and highly recommend him, I hope you will be very happy you called Mr. Garza. Best of luck."

Rachel Nunez

Private Client

“I can’t express enough how grateful I am for Marc’s help. He is an incredibly intelligent, articulate, patient, and experienced private detective who shows genuine care. He took the time to explain my options and provided custom suggestions. He instantly gained my trust by simply being open and honest. Should I need help again in the future, hands down I’m calling Marc. Thank you, Marc!!”