
St. Charles First DWI Defense Attorney
Being charged with a first DWI (Driving While Intoxicated) in Missouri can be overwhelming. For many people, it is their first encounter with the criminal justice system, and the uncertainty about what happens next can feel overwhelming. At , our priority is helping clients in St. Charles, MO, understand their rights, the legal process, and the defense options available to protect their future.
To get started on your defense, contact us today at (314) 334-3807.
What is a DWI in Missouri?
In Missouri, a DWI occurs when a driver operates a motor vehicle while under the influence of alcohol, drugs, or a combination of both. The law sets specific thresholds for blood alcohol concentration (BAC):
- 0.08% or higher for most adult drivers.
- 0.04% or higher for commercial drivers.
- 0.02% or higher for drivers under 21, under Missouri’s "zero tolerance" policy.
It’s important to note that a driver may still be charged with a DWI even if their BAC is below 0.08%, provided the officer believes their driving ability was impaired.
Because Missouri law treats DWIs seriously, even a first-time offense can bring consequences that affect your freedom, finances, driving privileges, and future opportunities.
What Happens After I’m Arrested?
If you’re arrested for a first DWI in St. Charles, the process typically unfolds in two parts: the criminal case and the administrative license suspension.
- The Arrest – Law enforcement may stop you for suspected impaired driving, request field sobriety tests, and administer a breath or blood test. If your BAC is over the legal limit, you’ll likely be arrested and taken into custody.
- Administrative License Suspension (ALS) – Within 15 days of your arrest, you must request a hearing to challenge the suspension of your driver’s license. If you don’t, your license will automatically be suspended, even before your criminal case is resolved.
- Criminal Court Proceedings – You’ll be formally charged and required to appear in court. The charges against you may include driving with excessive BAC, impaired driving, or related offenses.
- Potential Outcomes – Without representation, many first-time offenders face license suspensions, fines, probation, or even jail. With the help of a skilled St. Charles first DWI defense lawyer, you may be able to reduce or dismiss charges, negotiate lighter penalties, or explore alternative sentencing options.
First DWI Offense Penalties
Even though a first DWI is generally considered a misdemeanor in Missouri, the penalties can still be severe and life-altering.
Criminal Penalties:
- Up to 6 months in jail (though many first-time offenders receive probation)
- Fines of up to $500
- Possible court costs and probation fees
- Mandatory participation in a Substance Abuse Traffic Offender Program (SATOP)
Driver’s License Consequences:
- A 90-day license suspension
- Possibility of restricted driving privileges with an Ignition Interlock Device (IID) installed
Additional Consequences:
- Increased car insurance rates
- A permanent criminal record, which may affect employment and housing
- Travel restrictions to certain countries with strict DWI policies
It’s important to act quickly because your attorney may be able to challenge the traffic stop, field sobriety tests, or chemical testing, which could weaken the prosecution’s case against you.
First DWI FAQs
Will I go to jail for my first DWI in Missouri?
While jail time is possible, many first-time offenders avoid incarceration through probation, community service, or alternative sentencing.
Can I keep my driver’s license after a first DWI?
Yes, but only if you act quickly. You must request an administrative hearing within 15 days of your arrest to challenge the suspension. In some cases, restricted driving privileges may be available.
Can a first DWI be expunged in Missouri?
Yes, under certain conditions. If it is your only alcohol-related offense, you may petition for expungement after 10 years.
What if I refused the breath test?
Refusing a breath or blood test in Missouri triggers an automatic one-year license revocation under the "implied consent" law. However, you may still challenge this with the help of a lawyer.
Do I really need an attorney for my first DWI?
Absolutely. A DWI conviction carries long-term consequences that extend beyond the courtroom. An experienced St. Charles first DWI defense attorney can evaluate your case, identify weaknesses in the prosecution’s evidence, and protect your rights.
Why Choose ?
At , we understand the fear and uncertainty that comes with being charged with a first DWI in St. Charles. Our team provides:
- Personalized Defense Strategies – We tailor each case to the client’s circumstances.
- Aggressive Courtroom Advocacy – We challenge evidence, fight improper procedures, and negotiate favorable outcomes.
- Support Throughout the Process – From administrative hearings to criminal court appearances, we stand by you every step of the way.
Your first DWI does not have to define your future. With skilled legal guidance, you can move forward with confidence and peace of mind.
Contact a St. Charles First DWI Defense Lawyer Today
If you or a loved one has been arrested for a first DWI in St. Charles, MO, don’t wait to seek legal help. Every moment matters—especially when your driver’s license and freedom are on the line.
Call (314) 334-3807 or contact us online today to schedule a confidential consultation.

client testimonials
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Growing up often has painful mistakes, as my son can attest to! Mark and Nicole were both sympathetic and supportive as they ...
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WHY TRUST OUR ST. LOUIS CRIMINAL DEFENSE LAW FIRM?
What Makes Us Different
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We work directly with you to determine the best possible outcome based on your goals and needs. We then create personalized legal strategies to set your case up for success.
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Our attorneys pride ourselves on always being available to address any questions you have regarding your case. With our team, you aren't just a number.
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As former prosecutors who know how the 'other side' operates, we have a unique insight that allows us to set our client's cases up for success.
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The Hammer Law Firm, LLC team has more than 60 years of combined criminal law experience. We have the tools, knowledge, and resources to effectively advocate on your behalf.

When you want personal support and proven representation, you need to bring The Hammer Law Firm, LLC to the fight.