Marc A. Garza

Founder & CEO of GRI Investigative Group, Inc.

Background and Experience:

Marc is a licensed private investigator and CEO of GRI Investigative Group, Inc., a San Diego-based private investigations agency specializing in criminal defense, civil litigation, and post-conviction investigations. With over 30 years of law enforcement, investigative, and consulting experience, Marc is a trusted authority in uncovering truth and delivering actionable insights for his clients.

Before founding GRI Investigative Group, he served as a police sergeant, retiring in 2019 after a long career in law enforcement in San Diego, CA. Throughout his law enforcement tenure, he held assignments in patrol, field training (FTO), investigations, Special Weapons & Tactics ("SWAT"), tactical firearms training, and police supervision.

Marc’s comprehensive investigative skills have been utilized by law firms in both state and federal courts, where he has testified in criminal, civil, and family law cases. His expertise extends to felony-level criminal defense cases involving homicide, gang-related violence, and assault with a deadly weapon (ADW). His unwavering commitment to justice is exemplified by his work with The Innocence Center in San Diego, where he conducts post-conviction investigations aimed at overturning wrongful convictions.

As CEO of GRI Investigative Group, Marc leads a team of investigative professionals dedicated to providing meticulous and ethical investigative services. His leadership and strategic vision have positioned the firm as a trusted partner for attorneys, businesses, and individuals seeking thorough and reliable investigative solutions.

 Investigative Expertise:  

• Criminal Defense Investigations  (Homicide, Gang Related Crimes, Firearm related crimes.)
• Civil Litigation Investigations (Corporate Fraud, Personal Injury, Traffic Collisions)
• Family Law Investigations (Divorce, Child Welfare, Cohabitation, Court Order Violations)
• Background Investigations; Due Diligence Investigations; Person Locate Investigations
• Firearms Expertise; CA POST Certified Firearms Instructor in the AR-15, Shotgun & Handgun
• Technical Surveillance Counter Measures ("TSCM Bug Sweeps")