Marc A. Garza, P.I. 

Founder & CEO of GRI Investigations, Inc.

Background and Investigative Experience: 

Marc is a highly experienced investigator and a retired police sergeant with over 30 years of experience in law enforcement, investigations and consulting. Throughout his law enforcement career, Marc completed assignments in patrol, field training (FTO), investigations, SWAT, firearms training, and police supervision. After retiring from the police work in 2019, Marc founded GRI Investigations, Inc., where he leads a skilled team of investigators, all with law enforcement backgrounds.

Marc has a passion for post-conviction investigations and collaborates closely with The Innocence Center in San Diego, helping uncover wrongful convictions and ensuring justice is served. His vast expertise has made him a trusted authority in civil, family, and criminal defense cases, and he has testified in state and federal courts as a key expert.

Under Marc’s leadership, GRI Investigations, Inc. provides clients with thorough, professional, and results-driven investigative services.

Investigative Expertise:

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

Professional Affiliations:

• Member: California Association of Licensed Investigators ("CALI")
• Member: California Defense Investigators Association ("CDIA")
• Member: San Diego County Bar Association ("SDCBA")
• Staff Investigator at The Innocence Center ("TIC")