Dallas Criminal Defense Attorney



A Highly Respected Texas Criminal Defense Attorney

There are thousands of lawyers anxious to attract your business in Dallas/Fort Worth and throughout North Texas. It can seem impossible to know what attorney has the right blend of experience, service and proven results to handle your case.

At the law office of James L. Guinan, we think there are some important distinctions that set our service and ability apart from the competition. With thousands of clients defended, our Dallas, Texas, criminal defense lawyer has established an unshakable commitment to providing outstanding and personal criminal defense to our clients.

A Proud Career of Results-Driven Criminal Defense in Collin County, Texas

Our office represents clients in a wide range of criminal defense cases, from DWI arrests to child sex assault/indecency and white collar crimes. When you are looking for an attorney to handle your case, no matter how small or how large, this is what you need to know about our practice:

  • He has handled over 1000 cases in courts across North Texas obtaining dismissals, no-bills and winning not guilty verdicts for many defendants, defending against charges for every type of crime.

  • Our criminal defense practice operates in local, state and federal courts, handling a wide range of criminal defense cases such as violent crimes, drug cases, distribution and possession of child pornography, DWI, theft and juvenile crimes.

  • While many of James's colleagues like to focus on their past experience as a prosecutor or judge, Mike stays focused on achieving results in the courtroom.

When you have been accused of a crime, it is normal to feel embarrassed, frustrated or confused about the situation you are in. In this difficult and stressful time, it is important that you work with a criminal defense attorney you can trust.

If you are looking for representation backed by proven results and that will fight tirelessly for you, then call our office today at 972-849-7296 or 214/399-5703 for help in Spanish or contact us online to schedule a free initial consultation with our Dallas County, Texas, criminal defense attorney.




Law Office of James Guinan  

5646 Milton Street, Suite 530

Dallas, Texas 75206


Fax: 214-614-6144

Areas of Practice


Since repeated drug offenses can lead to more severe penalties over time, it is important to contest every drug charge as vigorously as possible. As a former Harris County prosecutor and with years of successful defense experience regarding drug-related charges, I provide clients with resources to navigate the complex criminal court system. 


DWI laws are complex, change regularly, and can include wide-ranging penalties, including jail time, license suspension, probation, and enormous insurance rates. You need professional representation. With my years of experience as a successful DWI defense attorney in Dallas/Fort Worth area and Collin and Denton Counties, I carefully consider the facts and circumstances of your case in order to mount the best possible defense..


An experienced defense attorney is paramount when fighting criminal charges of a sexual nature. Many alleged sexual assault crimes include drugs and alcohol, unreliable witnesses, and other circumstances that are important for a criminal defense attorney to investigate. You need a lawyer who has years of experience separating fact from fiction. You need a lawyer you can trust.


The penalties for a fraud conviction range from community service to imprisonment and hefty fines. Whether you are facing a misdemeanor or felony fraud charge, you need a lawyer with extensive legal knowledge and courtroom experience.



Assault and battery charges are among the most common criminal complaints in the Dallas/Fort Worth and Collin and Denton Counties, but they are serious charges nonetheless. I take great pains to investigate what you are accused of, what evidence may be used against you, and any inconsistencies that may aid our case.


Federal investigations are handled by a complicated web of agencies and investigating authorities, and federal prosecutors treat those charged with crimes very differently than local prosecutors might. My expertise in federal sentencing guidelines, mandatory minimum sentencing laws, federal defense strategies, and my past work with individuals, corporations, and other legal entities allows me to establish your very best defense against serious and threatening federal charges.


At the law office of James Guinan, located in Dallas, Texas, we can help you find out what is on your criminal record and explore your options. Many of our clients are shocked to discover that even if they were only arrested or charged with a crime, without a conviction, they may still have that arrest or charge on their record, sometimes decades after the incident.


We must all obey the great law of change. It is the most powerful law of nature.
— Edmund Burke



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