St. Louis DWI / DUI Defense Attorney

A DWI arrest in Missouri can affect far more than a single court date. In addition to potential criminal charges, a driver may also face immediate action against their driving privileges through the Missouri Department of Revenue. Many people are surprised to learn that a DWI case involves two separate matters — a criminal court case and an administrative license proceeding — each with its own deadlines and requirements. We help clients understand both processes and what steps must be taken right away.

Under Missouri law, a person may be charged with Driving While Intoxicated if they operate a motor vehicle while in an intoxicated or drugged condition. Missouri sets specific blood alcohol concentration (BAC) limits, including 0.08% for drivers age 21 and older, 0.04% for commercial drivers, and 0.02% for drivers under 21. Impairment is not limited to alcohol; charges may also arise from controlled substances, prescription medications, or even certain over-the-counter medications that affect a driver’s ability to safely operate a vehicle.

Law enforcement officers typically rely on observations, field sobriety testing, and chemical testing such as breath or blood analysis when making an arrest. Missouri’s implied consent law means that refusing a chemical test can result in an automatic license suspension, separate from any criminal penalties.

Penalties vary depending on prior history and the circumstances of the stop. A first offense is generally classified as a misdemeanor and may include fines, potential jail exposure, and license suspension. Repeat offenses can result in longer revocation periods, ignition interlock requirements, and felony-level charges in certain situations. Aggravating factors — such as a high BAC level, injury to another person, or a minor in the vehicle — may increase potential penalties.

Because the Department of Revenue may suspend a license before the criminal case is resolved, there is often a limited window of time to request an administrative hearing. Missing that deadline can affect driving privileges even if the court case is still pending. Our office helps clients review the circumstances of the stop, understand the evidence, prepare for court appearances, and navigate both the administrative and criminal processes so they know what to expect at each stage.

If you have been arrested for DWI or received notice of a license suspension, seeking guidance early can be important. We can review your situation, explain the procedures involved, and help you determine the next appropriate steps under Missouri law.