Mark Diaz

Mark Diaz is a Texas criminal defense attorney with nearly three decades of experience defending people charged with crimes. His practice includes assault, white collar crimes, sexual assault, homicide, federal criminal defense, DWI, drug manufacturing, theft, domestic violence, drug trafficking, drug possession, and expungements. He helps clients understand charges, protect rights, prepare defense strategies, and respond to prosecution with clear direction and focused representation in Texas courts.

Mark earned a J.D. from Thurgood Marshall School of Law. He also earned an undergraduate degree from the University of Houston. His education supports legal research, trial preparation, client counseling, and courtroom advocacy. He uses that background to review evidence, challenge allegations, prepare motions, explain risks, and guide clients through criminal cases involving state charges, federal issues, hearings, negotiations, and trial decisions.

Mark has built his legal career by focusing on criminal defense rather than spreading his work across unrelated practice areas. He is admitted to all Texas state courts and the United States District Court for the Southern District of Texas. His experience helps him evaluate criminal allegations, identify weaknesses in the prosecution’s case, negotiate when appropriate, and prepare for trial when a stronger defense requires courtroom advocacy.

Mark Diaz helps clients facing criminal charges move through stressful legal situations with direct communication and prepared defense work. His approach includes personal involvement, case review, motion practice, negotiation, and trial preparation. He works to protect freedom, reputation, and future opportunities for people accused of serious offenses. Through experience, strategy, and courtroom advocacy, he helps clients pursue the strongest available outcome under the facts and law.

Law Office Affiliations

• Attorney, Mark Diaz & Associates
• Member, State Bar of Texas

Licensed State

• Texas

Education

• Thurgood Marshall School of Law
  Juris Doctor (JD)
• University of Houston
  Bachelor of Arts (BA)

Awards & Badges