What Happens After a DWI Arrest in Missouri?

A DWI arrest in Missouri is one of the most disorienting experiences a person can go through. One moment you're driving home; the next, you're in handcuffs, your car is being towed, and you have no idea what comes next.

The good news: understanding the process gives you power. And the most important thing to know is this — the first 15 days after your arrest are the most critical window you have to protect yourself.

Here's exactly what happens, step by step.

Step 1: The Arrest and Booking

When a Missouri officer suspects DWI, they will typically conduct a traffic stop, administer field sobriety tests, and request a breathalyzer or blood test. Under Missouri's implied consent law, refusing a chemical test carries its own penalties — including an automatic license revocation.

After arrest, you'll be taken to a local jail or police station for booking. This involves fingerprinting, a mugshot, and processing. Depending on the county and time of day, you may be held overnight or released on bond.

What to do immediately: Remain calm. Do not answer questions beyond identifying yourself. Politely invoke your right to an attorney before any further questioning.

Step 2: The 15-Day License Hearing Deadline

This is the step most people miss — and it can cost them dearly.

In Missouri, when you're arrested for DWI, the arresting officer typically confiscates your driver's license and issues a temporary driving permit. That permit is valid for 15 days. Within those 15 days, you or your attorney must request an administrative hearing with the Missouri Department of Revenue to contest the suspension of your license.

Miss that deadline and your license is automatically suspended — even before your criminal case is resolved. A first-offense suspension typically lasts 30 days, followed by a 60-day restricted driving period. For a refusal, the suspension is one year.

An experienced DWI attorney can request this hearing on your behalf and, in many cases, use it as an opportunity to gather evidence and preview the prosecution's case.

Step 3: Arraignment

Your first court appearance is called an arraignment. This is where you are formally read the charges against you and asked to enter a plea — guilty, not guilty, or no contest.

In virtually every case, the right move is to plead not guilty at arraignment. This preserves your options and gives your attorney time to review the evidence, investigate the stop, and explore defenses. Pleading guilty at arraignment eliminates any chance of a reduced charge or dismissal.

Arraignment typically occurs within a few days to a few weeks of your arrest, depending on the county.

Step 4: Discovery and Case Investigation

After arraignment, your attorney will request discovery — the evidence the prosecution intends to use against you. This includes the officer's dashcam and bodycam footage, breathalyzer calibration and maintenance records, field sobriety test documentation, the arresting officer's written report, and any witness statements.

This is where a skilled DWI defense attorney earns their fee. Evidence that looks airtight on paper often has significant problems on closer inspection. Was the breathalyzer properly calibrated? Did the officer follow the correct protocol for field sobriety tests? Was there actually reasonable suspicion to pull you over in the first place?

Step 5: Pre-Trial Motions

Based on the evidence, your attorney may file pre-trial motions to suppress certain evidence. If the traffic stop was unlawful — meaning the officer lacked reasonable suspicion — everything that followed, including the breathalyzer result, may be inadmissible.

A successful suppression motion can dramatically weaken the prosecution's case and often leads to a dismissal or a significantly reduced charge.

Step 6: Plea Negotiations

Most DWI cases in Missouri are resolved through plea negotiations rather than trial. An experienced attorney knows what the prosecution values, what the judges in a given county tend to accept, and how to leverage weaknesses in the evidence to negotiate a better outcome.

Common outcomes in DWI cases include dismissal when evidence is suppressed, reduction to a lesser charge such as careless and imprudent driving, suspended imposition of sentence (SIS) which does not result in a conviction on your record if completed successfully, and diversion programs available for some first-time offenders.

Step 7: Trial

If no acceptable plea agreement is reached, the case proceeds to trial. Missouri DWI cases can be tried before a judge (bench trial) or a jury. Your attorney will advise you on which is more advantageous given the specific facts of your case.

At trial, the prosecution must prove beyond a reasonable doubt that you were operating a vehicle while intoxicated. Your attorney will challenge the evidence, cross-examine witnesses, and present any applicable defenses.

The Consequences of a Missouri DWI Conviction

Understanding what's at stake makes the urgency of early action clear. A first-offense DWI conviction in Missouri can result in up to 6 months in jail, fines up to $1,000 plus court costs, license revocation for 30–90 days, points on your driving record, mandatory substance abuse traffic offender program (SATOP), ignition interlock device requirement, and significant impact on employment, professional licenses, and insurance rates.

A second or subsequent offense carries substantially harsher penalties, including mandatory jail time.

Why Early Action Makes All the Difference

The single most important thing you can do after a DWI arrest in Missouri is contact an experienced criminal defense attorney immediately — before the 15-day license hearing deadline, before you speak to investigators, and before you make any decisions about your case.

Jeff Goldfarb has spent 30 years defending St. Louis residents against DWI and DUI charges. He knows Missouri courts, he knows the prosecutors, and he knows how to find the weaknesses in a DWI case that most people would never see.

Schedule your free DWI consultation today — call or text (314) 229-1028.