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Criminal Defense Areas

Mercer & Keirnan criminal defense lawyers defend all misdemeanor and felony charges in Harris County, Texas and the surrounding counties. With more than 40 years of combined experience as Houston criminal defense attorneys, we are familiar with all types of criminal charges. Take advantage of our free consultation services and speak with an attorney at Mercer & Keirnan today. Learn the defenses you may have available to fight the charges against you. Criminal defense attorneys John P. Keirnan and Michael D. Mercer will show you what to expect as you make your way through the pretrial and trial processes.

  • Murder

  • Manslaughter

  • Rape

  • Aggravated Robbery

  • Assault and Battery

  • Sexual Assault

  • Injury to a Child

  • Kidnapping

  • Aggravated Sexual Assault

  • Failure to Register as a Sex Offender

  • Indecency with a Child

  • Indecent Exposure

  • Possession of Child Pornography

  • Prostitution

  • Rape

  • Sexual Assault

  • Sexual Assault of a Child

  • Statutory Rape

  • Do I need an expungement lawyer?

  • DWI Expungements

  • Expungement process

  • Felony expungements-expunctions

  • How to get my criminal record expunged?

  • Can I expunge my record?

  • How long does the expungement process take?

  • How much does it cost to clear my record?

  • Petitions for Non-Disclosure

  • Which Offenses can I get expunged?


"Lawyer of the Year"

Harris County Criminal Lawyers Association (2014)

Free Case Evaluation

Request a phone call directly from Mr. Keirnan and Mr. Mercer to talk about your case.

Mercer & Keirnan

Houston Criminal Defense Attorneys

917 Franklin St #550

Houston, Texas 77002




Open 24/7


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 In addition to Harris County, we also serve:

  • Harris County

  • Fort Bend County

  • Montgomery County

  • Galveston County

  • Brazoria County

Why Hire Mercer & Keirnan

  • Over 38 Years of Criminal Defense Experience in Houston

  • 2014 Lawyer of the Year (Harris County Criminal Lawyers Association)

  • Recognized In the News nationwide as a renowned criminal defense attorney

  • We give our personal phone numbers to our clients so they can reach us easily any time

  • Avvo.com 2017 "Client's Choice"

  • Avvo.com rating of "Excellent"




  • Officer's Murder Trial Begins with Emotion, ABC7 News Chicago - Mar. 18, 2010

Disclaimer: The information contained on this site is not intended as legal advice and is solely meant for general informational purposes. Any and all interaction with this site in no way creates an attorney-client relationship unless and until an agreement is actually reached.

Copyright 2020 Mercer & Keirnan. All Rights Reserved.