New Location, Same Tradition: Goldstein & Orr Has Moved Offices Learn More

Client Testimonials
  • "I have known Ms. Orr for over a decade and she is an excellent criminal defense attorney with high ethical standards." by Peer Attorney Read More
  • "The best of the best above all the rest. Accept no substitutes." by Richard R. Read More
  • "They are next level on intelligence and understanding. My full respect to these attorneys." by Amber R. Read More
  • "They're the best, very thorough." by Doug T. Read More
  • "GGH has no equal in Texas or elsewhere. Cynthia Orr and Gerry Goldstein don't just defend their clients, they make law. I've watched them over the years take impossible cases and win." by Debra I. Read More

Aaron M. Diaz

Attorney Aaron Diaz

Aaron M. Diaz Office: (210) 226-1463 Fax: (210) 226-8367

Aaron M. Diaz started his legal career at the age of 17, spending over a decade working as a paralegal in the private and public sector.  Aaron dedicated six years working as a paralegal for a criminal defense firm in his hometown of Edinburg, Texas, and several years working for various Texas government agencies including the Office of the Solicitor General of Texas.  As a paralegal for Texas’s chief appellate attorney, Aaron developed a strong passion for appellate practice by working on complex, high profile cases.  Before attending law school, Aaron received his Bachelor of Science degree in Criminal Justice from the University of Texas Pan-American, and a Master of Arts degree in Legal Studies from Texas State University.


Aaron graduated from St. Mary’s University School of Law, cum laude, in May of 2020.  His passion for writing earned him several awards throughout law school. During his first year, Aaron received the Excellence in Writing Award or “Super Brief,” which is awarded to a first-year law student who demonstrates superior brief writing skills.  Aaron also represented St. Mary’s Law in The Paper Chase legal writing competition, placing third against other Texas law school students.  Additionally, Aaron served on the St. Mary’s Law Journal as a staff writer and senior associate editor.  His student comment entitled, Restoring the Presumption of Innocence: Protecting a Defendant’s Right to a Fair Trial by Closing the Door on 404(b) Evidence, was published in Volume 51 of the St. Mary’s Law Journal.


During his third year of law school, Aaron served as a student defense attorney in the St. Mary’s Criminal Justice Clinic where he represented indigent defendants accused of crimes.  His service to the Clinic earned him the Francisco Leos Award for Excellence in Clinical Studies.  Aaron was also the recipient of the Lucien Campbell Criminal Law Scholarship and the Texas Criminal Defense Lawyers Association Charles Butts Scholarship.


During law school, Aaron began clerking for Cynthia E. Orr and Gerald H. Goldstein, assisting in complex criminal matters ranging from capital murder, sexual assaults, and white-collar crimes.  Aaron also worked diligently on state and federal appeals and post-conviction writs of habeas corpus.  And, after successfully passing the Texas Bar exam, Aaron joined Goldstein & Orr as an associate attorney.  His current practice focuses solely on juvenile and adult criminal defense, including misdemeanors, felonies, appeals, and post-conviction writs of habeas corpus cases.  Aaron is also fluent in Spanish.

aaron diaz criminal defense lawyer san antonio texas

Credentials and Experience


  • Mary’s University School of Law, J.D., 2020, Cum Laude
  • Texas State University, M.A, 2014
  • University of Texas Pan American, B.S., 2012

Bar Admissions:

  • Texas
  • Northern District of Texas
  • Eastern District of Texas
  • Southern District of Texas
  • Western District of Texas
  • Fifth Circuit Court of Appeals

Professional Associations and Memberships

  • San Antonio Criminal Defense Lawyers Association, 2020 – Present
  • Texas Criminal Defense Lawyers Association, 2020 – Present
    • Board of Directors, Dec. 2021 – Present
    • Amicus Committee, Member, Aug. 2022 – Present
    • Long-Range Planning, Member, Apr. 2023 – Present
    • New Lawyer Committee, Member, Aug. 2022 – Present
    • Law Students Committee, Member, Aug. 2022 – Present
    • Social Media Committee, Co-Chair, Dec. 2022 – Present
    • Nominations Committee, Member, Aug. 2022 – Aug. 2023
    • Podcast Producer – Sidebar with TCDLA
  • National Association of Criminal Defense Lawyers, Dec. 2020 – Present
  • International Society for the Reform of Criminal Law, Dec. 2020 – Present
  • American Bar Association Criminal Justice Section, Dec. 2020 – Present
  • State Bar of Texas Criminal Justice Section and Appellate Section, Dec. 2020 – Present
  • San Antonio Young Lawyers Association, June 2022 – Present
  • William S. Sessions American Inn of Court, Aug. 2022 – Present


  • Tips for Brief Formatting and Avoiding a Benchslap, San Antonio Paralegal Association Meeting, 2021
  • Basics of Juvenile Law, St. Mary’s Criminal Law Association Member Meeting, 2022
  • Career Pathways to Criminal Defense Practice, TCDLA Law School Committee Event, 2022, 2023
  • Wrongful Convictions: A Series, Panelist, St. Mary’s Law School, 2022
  • Marijuana Legislation Update, Inns of Court Meeting, 2023
  • Negotiating with the State: Practical Tips for the New Criminal Defense Lawyer in Unfamiliar Territory, TCDLA Building Blocks Seminar, 2023
  • Criminal Defense Panelist, St. Mary’s Criminal Law Association Meeting, 2023

Notable Cases

  • In the Matter of I.V. – Capital Murder – Prevented 16-year-old juvenile client from being certified as an adult and negotiated a determinate sentence.
  • State v. R.A. – Aggravated Sexual Assault of a Minor – After negotiations and receiving defense investigative materials, the Guadalupe County Attorney’s Office declined to prosecute.
  • State v. H.G. – Promotion of Intimate Visual Material – After pre-indictment negotiations, the Kleberg County District Attorney’s Office closed the matter without prosecution.
  • State v. D.G. – Failure to Stop and Render Aid – After pre-indictment negotiations, the Bexar County District Attorney’s Office the Grand Jury no billed the case.
  • State v. C.A. – Assault Bodily Injury – Dismissed by the Bexar County District Attorney’s Office.
  • In re C.M. – Medicare Fraud – State Office of Inspector General declined to pursue charges.
  • State v. T.H. – Sexual Assault – After pre-indictment negotiations, the Guadalupe County Attorney’s Office declined to prosecute.
  • State v. R.H. – Possession of a Controlled Substance in a School Zone – Dismissed by the Bexar County District Attorney’s Office.
  • United States v. P.R. – DEA Drug Trafficking Investigation – No charges brought by the Government.
  • State v. K.J. – Aggravated Sexual Assault of a Minor – No criminal charges brought against pro bono, minor client.
  • State v. H.B. – Sexual Assault – Dismissed by the Bexar County District Attorney’s Office.
  • State v. J.R. – Protective Order – Dismissed by the Bexar County District Attorney’s Office.
  • State v. D.S. – Assault Family Violence – Dismissed by the Bexar County District Attorney’s Office.
(210) 226-1463
  1. Attorneys
  2. Results
  3. Contact