DUID Attorney in Sheboygan, Wisconsin

Exclusive DUI Defense. Over 1,000 Dismissals & Reductions Since 1993.

A drug DUI charge in Wisconsin, formally called DUID, moves through the same Operating While Intoxicated framework as an alcohol charge but confronts prosecutors with a harder evidentiary problem: there is no breathalyzer for drugs. Proving impairment requires blood analysis, officer observation, and often testimony from a Drug Recognition Expert, all of which can be challenged. The right defense starts with an attorney who understands exactly where those challenges live.

At Melowski & Singh, LLC, we practice DUI defense exclusively. We don’t handle divorce, personal injury, or general criminal work. Every case in our office is an OWI case, and since 1993 we’ve achieved more than 1,000 dismissals or reductions to non-alcohol-related charges across Wisconsin, including cases in Sheboygan County. If you’ve been arrested for DUID, call us for a free consultation at (920) 294-1414.

Facing a drug DUI charge in Sheboygan? Call Melowski & Singh, LLC at (920) 294-1414 or contact us online to schedule a free consultation with a DUID attorney in Sheboygan.

What Is a DUID in Wisconsin?

DUID stands for driving under the influence of drugs. Wisconsin treats it as a specific subset of OWI under Wis. Stat. 346.63, carrying the same penalties and license consequences as alcohol-based charges. Any substance that impairs a driver’s ability to safely operate a vehicle can support a DUID charge, including illegal narcotics, prescription medications, and over-the-counter drugs. The charge isn’t limited to recreational drug use.

Under Wisconsin’s drug DUI laws (Wis. Stat. 343.305), operating a vehicle on public highways constitutes deemed consent to chemical testing for drugs or alcohol when requested by a law enforcement officer. In drug investigations, blood is the specimen most commonly requested because it’s the only sample that can identify and quantify restricted controlled substances for evidentiary purposes. The Wisconsin State Laboratory of Hygiene performs blood analysis in OWI drug cases.

Two Ways Wisconsin Prosecutors Charge DUID

Wisconsin’s DUID law operates under two separate theories of liability, and each requires a different defense approach.

Impairment-Based OWI
The first theory charges that a driver operated a vehicle while impaired to the degree of being incapable of safe driving. Prosecutors must show actual impairment at the time of driving. This is the harder theory to prove and the more common one for prescription and over-the-counter medication cases.

Per Se Restricted Controlled Substance
The second theory makes it illegal to operate a vehicle with any detectable amount of a per se restricted controlled substance in the blood, regardless of whether the driver appeared impaired. Substances covered include cocaine, methamphetamine, and Delta-9-THC. A driver can face this charge with no observed signs of impaired driving whatsoever.

One statutory exception applies to Delta-9-THC concentrations below one nanogram per milliliter of blood. Wisconsin hasn’t legalized recreational or medical marijuana, so no legal-use defense applies here the way it might in other states. A separate affirmative defense under Wis. Stat. 346.63(1)(d) exists for the per se charge only: if the driver held a valid Wisconsin prescription for the detected substance at the time of the stop, that prescription can be raised as a defense to the per se theory. It does not apply to the impairment-based OWI charge.

Drug Recognition Experts & the Limits of DUID Enforcement

Wisconsin law enforcement uses Drug Recognition Expert (DRE) officers, trained under a protocol certified by the International Association of Chiefs of Police, to identify signs of drug impairment at the roadside. DRE evaluation covers a 12-step protocol and can result in an officer opining that a driver is impaired by a specific drug category. That testimony carries weight in court, but it has real limitations.

DRE testimony in Wisconsin is subject to Daubert reliability analysis as specialized knowledge. The protocol has documented limitations in distinguishing between drug categories and doesn’t account for individual tolerance. More fundamentally, drug concentration and drug impairment are two separate scientific questions. Blood test results report concentration at the time of the draw, not at the time of driving, and because metabolism rates vary significantly between individuals, backward extrapolation to driving-time impairment is scientifically unreliable.

Wisconsin recently authorized roadside oral fluid saliva tests for initial drug screening. These tests aren’t admissible in court to establish guilt; they can only support probable cause for arrest and a blood draw request. As DRE training expands and testing capacity grows, arrest rates can rise. That makes early intervention with a qualified DUID attorney in Sheboygan more important, not less.

What “Impaired” Means Under Wisconsin Law

Wisconsin statutes draw a distinction between criminal negligence (Wis. Stat. 939.25) and criminal recklessness (Wis. Stat. 939.24). Both involve behavior that creates a substantial and unreasonable risk of death or great bodily harm, but the distinction is awareness: criminal negligence applies when the actor should recognize the risk but doesn’t; criminal recklessness requires that the actor is actually aware of it. That difference matters most in prescription and over-the-counter medication cases, where a driver may have had no reason to know their driving ability was affected.

Consequences of a DUID Conviction in Wisconsin

The penalties for a DUID conviction in Wisconsin escalate with each prior OWI offense. A fourth offense is a Class H felony. Even a first conviction produces consequences that extend well beyond the courtroom.

Potential consequences include:

• Fines and court costs: Significant financial penalties attach to every conviction tier
• License revocation: Court-ordered revocation runs separately from the chemical test refusal suspension, which begins 30 days after the Notice of Intent to Suspend is issued if no hearing is requested within 10 days
• Occupational license: May be available during suspension but isn’t automatic; approval depends on suspension type, interlock requirements, and DMV review
• Probation: Often includes mandatory drug testing and counseling requirements
• Mandatory treatment: Courts frequently require participation in drug education or treatment programs
• Jail time: Required for repeat offenses and possible on a first conviction depending on aggravating factors
• Permanent criminal record: Affects employment applications, professional licensing, housing, and personal relationships
• Increased insurance rates: A conviction typically results in substantially higher premiums

Why Sheboygan Clients Choose Melowski & Singh, LLC for DUID Defense

We practice only DUI defense. That focus produces a depth of case experience. Since 1993, we’ve had more than 1,000 drunk and drugged driving cases dismissed or reduced to non-alcohol-related charges across Wisconsin. Attorney Dennis Melowski has personally achieved more than 600 of those dismissals and reductions, including more than 100 complete jury trial acquittals.

Peer Recognition & Awards

Dennis has been voted by his peers as Wisconsin’s top DUI defense attorney in Milwaukee Magazine’s annual listing every year since 2005. In 2011, Newsweek named him a Leader in Criminal Defense, one of only eight attorneys selected nationally and the only one from Wisconsin. He received the Wisconsin Law Journal’s 2015 Leader in the Law award, the only DUI defense attorney to receive the honor in the award’s 12-year history at that time. Avvo has named him Clients’ Choice for DUI defense in Wisconsin every year since 2014, based on the highest volume of five-star client reviews in the field.

Supreme Court Experience & Trial Readiness

That recognition reflects something concrete: Dennis has argued four cases before the Wisconsin Supreme Court. In State v. Blackman (2017), he convinced the court to suppress a blood test result in a felony OWI-Causing Injury case, resulting in complete dismissal of all charges. That appellate experience reflects what trial-readiness can look like in a drug DUI case where blood evidence is central to the prosecution’s theory.

We prepare every case for trial. Cases heard in Sheboygan County Circuit Court receive the same investigation and preparation as any case we take to a jury. That approach is part of the record we’ve built, and it’s how we defend you.