Shreveport, Louisiana’s Zero Tolerance Law: DWI Penalties for Drivers Under 21

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Shreveport, Louisiana’s Zero Tolerance Law: DWI Penalties for Drivers Under 21

  |   Oct 14, 2026

  |  criminal defense

For a young driver, a night out that ends with a traffic stop can lead to consequences that last well beyond the evening. Louisiana takes a stricter approach to drinking and driving for people under 21, and the rules that apply to them are different from those that apply to adult drivers. If you or your child is facing an underage DWI in Shreveport, understanding how the zero tolerance approach works is a helpful first step. 

What “Zero Tolerance” Means for Drivers Under 21 

Zero tolerance refers to the idea that drivers under the legal drinking age are held to a much lower alcohol limit than adults. Because it is illegal for someone under 21 to consume alcohol in the first place, the law treats even a small amount of alcohol in a young driver’s system as a serious matter. The practical effect is that a young driver can face consequences at a level of alcohol that would not lead to a charge for an adult. The exact limit and the specific penalties are set by Louisiana statute, so it is worth confirming the current numbers with an attorney rather than relying on a general rule of thumb. 

Two Separate Tracks: Criminal Charges and License Action 

One of the most important points for any DWI arrest is that there are two separate processes. The criminal case is handled in court, while the driver’s license is addressed through a separate administrative process. The two can move on different timelines and have different outcomes. This is true for adults and for drivers under 21, and it is a reason a young driver should not assume that resolving one track takes care of the other. 

The Administrative Hearing Deadline Matters 

Following an arrest, there is limited time to request an administrative hearing about a license suspension. Missing that window can mean losing the opportunity to challenge the suspension at all. At the Law Offices of Mark D. Frederick, assistance includes filing the administrative hearing request on time and challenging the officer’s basis for the suspension. Because the deadline is short, acting quickly after an arrest is one of the most valuable things a young driver or parent can do. 

Even a First Offense Carries Real Consequences 

A first-time DWI is not a minor traffic matter. Even an initial offense can bring license suspension, fines, mandatory classes, higher insurance costs, and possible jail time. For a driver under 21, the consequences can also reach school, scholarships, jobs, and future opportunities. Our DWI and DUI page explains how a DWI charge is treated as a criminal matter with long-lasting effects, not just a traffic issue. 

How a Defense Is Built 

A strong defense starts with a careful look at how the case was handled. That includes whether the traffic stop was justified and lawful, how field sobriety tests were administered, including conditions, instructions, and any physical limitations, and whether the chemical test was reliable. Chemical testing can raise questions about device calibration records and whether proper procedures were followed. Officer conduct and documentation are also reviewed for possible rights violations. This kind of review applies whether the driver is 18 or 48, but it matters especially when the margin between legal and illegal is as small as it is under a zero tolerance rule. 

Other Charges That Can Come Up at the Same Time 

A traffic stop involving a young driver sometimes leads to more than one issue. Depending on the circumstances, there may be questions about alcohol possession or other offenses. If a stop also involves controlled substances, you can read about drug possession charges and the broader category of drug crimes in Louisiana. Understanding everything a person may be facing helps avoid surprises later. 

Protecting a Young Driver’s Future 

Because a conviction can follow a young person for years, it is worth thinking early about how to limit the long-term impact. Professional and educational plans can be affected by a record. In some situations, there may be options to clear a record down the road, and you can learn more about expungement in Louisiana. Our criminal defense FAQ also answers common questions about what to expect after an arrest. 

What Parents Can Do Right Away 

If your son or daughter has been arrested, the most useful steps are practical ones: gather any paperwork from the arrest, note the date so the administrative deadline is not missed, avoid discussing the details with others, and reach out to an attorney quickly. Calm, organized action in the first few days can make a real difference. 

Facing an Underage DWI in Shreveport? 

At the Law Offices of Mark D. Frederick, we help clients across Shreveport and northwest Louisiana respond to DWI charges, from challenging the basis for a license suspension to examining the evidence behind the stop and the testing. Learn more about our full range of criminal defense services. 

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