Florissant DWI Lawyer

Missouri classifies a DWI by the number of prior intoxication-related offenses on a person’s record (§577.001, §577.023), and each step up the ladder sharply raises the stakes.

A prior offender is someone with one intoxication-related offense within the past five years. Persistent and higher classifications count prior offenses committed on separate occasions, with no fixed lookback period, so older offenses can still count. Full penalty details for each level appear on our Missouri DWI penalties pages.

When a Florissant DWI Becomes a Felony

Not every DWI is a misdemeanor. A third offense reaches felony territory as a persistent offender charge, and the classifications climb from there. Separately, a DWI that causes serious injury or death is a felony on its own, regardless of a person’s record.

Missouri increased these penalties in 2026 under Melanie’s Law (House Bill 1740): a DWI causing serious injury rose from a Class D to a Class C felony, and a DWI causing death rose from a Class C to a Class B felony, carrying a mandatory minimum of five years before parole eligibility.

The same law now requires an ignition interlock device for a first-time offender whose blood alcohol content is 0.15 or higher. A felony DWI is prosecuted in the St. Louis County Circuit Court in Clayton and carries the lasting weight of a felony record, which is why our Missouri DWI defense takes even a first felony-level allegation seriously from the start.

First-Offense DWI in Florissant

Most DWI cases we handle are first offenses, and for a first-time client the goal is usually to keep the arrest from becoming a conviction that follows them for good. A first offense is a Class B misdemeanor, and an eligible person may qualify for a suspended imposition of sentence, which allows completion of probation without a conviction entering the public record. Even a first offense now carries an ignition interlock requirement when the blood alcohol level is 0.15 or higher, and the administrative license action applies either way. We handle first-offense DWI cases with an eye toward the cleanest possible outcome, because what happens on a first charge shapes how a second one, if it ever comes, would be treated.

License Suspension After a DWI in Missouri

A DWI arrest does more than start a criminal case; it puts the driver’s license at immediate risk. The Missouri Department of Revenue can suspend a license through an administrative action that runs separately from the criminal charge and moves on a short deadline. A person generally has just 15 days from the notice of suspension, which is handed over at the time of arrest, to request a hearing. Requesting that hearing on time also keeps a temporary driving permit in effect until it is decided, which can be months later. Missing the window can mean an automatic license suspension no matter what happens in court.

Refusing a breath or blood test carries its own consequence under Missouri’s implied consent law, a one-year revocation, though a refusal does not end the criminal case and has defenses of its own. We handle the license side and the criminal side together, so neither is left undefended while attention goes to the other.

DWI Defense Strategies in Florissant

Florissant’s location along Interstate 270 and other busy corridors makes DWI stops common here, and many of those stops give a defense something to work with.

• The traffic stop. Every DWI begins with a stop, and the Fourth Amendment requires a valid reason for it. A stop without reasonable suspicion can lead to the evidence being suppressed.
• Rising blood alcohol. Alcohol takes time to absorb, so a person’s blood alcohol level while driving can be lower than it is later at the station. When the timeline supports it, this gap is a recognized challenge.
• The arrest and the observations. An officer’s report of odor, speech, and balance is subjective, and video from the scene often paints a more measured picture than the words on the page.
• Medical and other explanations. Fatigue, anxiety, medical conditions, and even footwear can affect performance on field sobriety tests, and those innocent explanations rarely make it into the report.
• The license hearing. The administrative case has its own defenses and its own deadline, and winning it can keep a person driving even while the criminal case continues.

Challenging Breath and Field Sobriety Tests

The numbers and observations that drive a DWI charge are not as ironclad as they appear. Breath machines require regular calibration and maintenance, and a device that is out of specification produces unreliable readings. Blood tests depend on proper collection, storage, and an unbroken chain of custody. Field sobriety tests follow specific NHTSA protocols, and because our founding attorney trained on those same standards, we can identify the deviations that undermine the results. We examine the breath and blood testing in every case, because a flawed test can change the outcome entirely.

What a DWI Conviction Costs Beyond the Case

The sentence a court imposes is only part of what a DWI costs. A conviction typically means higher insurance rates and an SR-22 filing, points against the license, and, in many cases, an ignition interlock device installed at the driver’s expense. For anyone who drives for a living, the consequences can reach a paycheck directly, and a commercial license holder faces disqualification rules stricter than those for other drivers, even for a DWI in a personal vehicle. A conviction also leaves a criminal record that surfaces in background checks for years. Because these effects reach so far beyond the courtroom, keeping a charge from becoming a conviction is often the most valuable thing a defense can accomplish.

Why Choose Our Florissant DWI Attorneys

DWI is not a sideline for us; it is the core of what we do.

• DWI makes up about 40% of our practice, so we see these cases, and their defenses, constantly.
• Our founding attorney’s NHTSA training lets us challenge field sobriety and breath evidence on the same terms the state relies on.
• We prepare every case as if it is going to trial and obtain all discovery, especially video, on every case, because dash-cam and body-cam footage frequently tells a different story than the report.
• Our flat fee covers both the criminal case and the administrative license hearing, with flexible payment plans available.

Whether a client made a mistake or was wrongly accused, we work to protect their license, their record, and their future. For most people a DWI is their first time in the criminal system, and we treat it with the seriousness that first impression deserves.

Flat-Fee DWI Defense in Florissant

We handle most DWI cases on a flat fee set at the start, and that fee covers both the criminal case and the administrative license hearing, so the cost is clear from the beginning. Our consultations are free and confidential, and we are available around the clock. Our office is in Sunset Hills, and we serve Florissant and North County, with consultations in the office, by video, or at the jail when needed. For the local courts and the full range of charges we handle, see our Florissant criminal defense lawyer page.

Free consultations are available 24/7. Call or text any time.

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References

• §577.010, RSMo [Driving while intoxicated]
• §577.012, RSMo [Driving with excessive blood alcohol content]
• §577.001, RSMo [Intoxication-related traffic offense definitions]
• §577.023, RSMo [Prior, persistent, aggravated, chronic, and habitual offender enhancements]
• §302.505 to §302.540, RSMo [Administrative license suspension; 15-day hearing request]
• §577.041, RSMo [Chemical test refusal; one-year license revocation]
• House Bill 1740 (2026) [Melanie’s Law; increased penalties for DWI causing injury or death; ignition interlock for first offenders at 0.15 BAC or higher]