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The Law Office of Michael D. Mercer is a leading criminal justice attorney in Houston, Texas. Mercer & Keirnan, comprised of Criminal Defense Attorneys John P. Keirnan and Michael Mercer, offer over 38 years of combined experience defending all criminal charges in and around Houston. If you have been arrested or charged with a crime, don’t hesitate to contact Mercer and Keirnan at 713-236-9700 for a free case evaluation. John P. Keirnan, named Lawyer of the Year in 2014, and Michael Mercer are dedicated to providing top-notch legal representation for clients facing criminal charges. Whether you need a criminal attorney, DWI attorney, or a Harris County criminal defense attorney, Mercer and Keirnan have the knowledge and expertise to help you navigate the legal system and achieve the best possible outcome for your case. Trust Mercer & Keirnan to fight for your rights and protect your future.

Criminal justice attorney

Matches Malone

3/20/2025

I can't thank Michael Mercer enough for all of his help. A complete miracle worker. It did seem like the odds were against us, but his professionalism and experience prevailed.

Amit Gupta

3/04/2025

A great attorney that will tell you honestly how your case is and will be there every step of the way. Great in communication and will talk to you more like a friend, reassuring everything will be okay and that he gots this. Highly recommend!