Mr. Castillo is committed to the highest standards of professionalism. This means that he maintains the accreditation, insurance, and licensing that provides you the protection and peace of mind that you deserve.

Mr. Castillo is committed to giving his clients the personalized service they expect, and the quality of work they will enjoy for many years to come. Mr. Castillo knows that professional Legal Services can make a world of difference in your case. Mr. Castillo is professional in every aspect of his work, from start to finish.

His success depends upon every case he completes to your satisfaction, and he takes great pride in giving you the best service possible. His goal is to earn your trust by giving you exceptional service so you will refer him to your family and friends.

Juvenile Defense Attorney

Mr. Castillo is a skilled attorney with extensive experience representing juveniles in a variety of settings.  He has successfully managed his Juvenile/Criminal Defense law practice for over 25 years.  Mr. Castillo serves as a Visiting Judge for the 315th District Court of Harris County, Texas.  He possess knowledge of basic Spanish.  His areas of expertise include:

  • Criminal Law/Juvenile Defense
  • CPS Cases and Proceedings
  • Juvenile Court Proceedings
  • Certification & Determination Hearings
  • Misdemeanor and Felony Cases
  • Multicultural Communications/Literacy
Professional Experience

Law Office of Mark A. Castillo, Friendswood, Texas – 1989-Present
Juvenile Defense Attorney/Criminal Defense Attorney
Represent primarily juveniles in all criminal (misdemeanor through felony) and CPS cases and proceedings, including Certification and Determinate hearings.

315th Juvenile Court, Houston, Texas – 2010-Present
Visiting Judge/Associate Juvenile Reference
Appointed Associate Juvenile Referee to preside over and adjudicate hearings.

City of South Houston Municipal Court, South Houston, Texas 2005-5/2011
Former Presiding Judge
Preside over Bench Trials, Jury Trials, Forfeiture Hearings and related proceedings.

Education and Credentials
Juris Doctor (1988)
South Texas College of Law – Houston, Texas
President, Hispanic Law Student Association
Regional President, Hispanic National Bar Association
President, Mexican American Bar Association
Bachelor of Arts in Criminal Justice (1985)
University of Texas at San Antonio – San Antonio, Texas
Licensed to practice law in the State of Texas
Professional Memberships


American Bar Association
National Association of Criminal Defense Lawyers
Harris County Criminal Lawyers Association
Texas Municipal Courts Association
Mexican American Bar Association
State Bar of Texas
Juvenile Law Section of State Bar of Texas
Texas Criminal Defense Lawyers Association
Hispanic National Bar Association
Houston Bar Association