How Do Alcohol or Drugs Affect a Sex Crime Defense in Wisconsin?

 Posted on April 30, 2026 in Criminal Defense

Alcohol and drugs can affect a sex crime defense in Wisconsin in more ways than one. The impact depends on who was intoxicated, how intoxicated they were, and what the specific charge involves. Intoxication can be raised as a defense by the person accused. But it can also be used by the prosecution to argue that the alleged victim could not consent. Understanding how both sides use intoxication is critical to building an effective defense. If you are facing a sex crime charge in 2026, a Dodge County criminal defense lawyer can help you fight back.

How Does Wisconsin Define Consent in Sex Crime Cases?

Consent is at the center of most sex crime cases in Wisconsin. Under Wisconsin Statute § 940.225, sexual assault is when sexual contact or intercourse happens without the other person's consent. Wisconsin law defines consent as words or actions that show a freely given agreement to the act. A person cannot give legal consent if they are unconscious. The same is true if they are too intoxicated to understand what is happening and therefore give voluntary and informed agreement.

This matters a great deal in cases involving alcohol or drugs. It means the level of intoxication of the alleged victim is directly relevant to whether consent could have been given at all.

Can Being Drunk or High Be Used as a Defense to Sex Crime Charges in Wisconsin?

In general, being voluntarily drunk or high is not a complete defense to a sex crime charge. The fact that the accused was intoxicated at the time does not excuse the conduct or eliminate criminal liability on its own. In many sexual assault cases, this argument is not available because the law does not require proof of a specific intent.

That said, intoxication can sometimes be relevant to the mental state required for the specific charge. Some sex crime offenses require the prosecution to prove a specific intent. If the defense can show that the accused was so severely intoxicated that they could not have formed that intent, that argument may be available in limited situations. However, it is a narrow and difficult argument to make, and it does not apply to all charges.

How Does the Alleged Victim's Intoxication Affect a Sex Crime Case?

The alleged victim's level of intoxication is often the central issue in these cases. Wisconsin law recognizes that a person incapacitated by alcohol or drugs cannot give meaningful consent. Under Wisconsin Statute § 940.225(2)(d), having sexual intercourse with someone who is unconscious or too intoxicated to consent is second-degree sexual assault, which is a serious felony.

Prosecutors use evidence of the alleged victim's intoxication to argue that consent was not possible. That evidence can include witness accounts of how the alleged victim appeared, blood alcohol test results, text messages, social media posts, and the alleged victim's own testimony about what they remember or do not remember.

What Defense Arguments Are Available When Alcohol or Drugs Were Involved?

Even when alcohol or drugs were involved, there are real ways to challenge the state's case. A defense attorney will look closely at several key questions:

• Whether the alleged victim was actually too intoxicated to consent, or whether they were drinking but still capable of making decisions

• Whether the accused genuinely and reasonably believed the other person was consenting based on their words and actions at the time

• Whether the alleged victim's account of how intoxicated they were matches the other evidence from that night

• Whether witness accounts support or contradict the prosecution's version of events

• Whether the physical and forensic evidence backs up or undermines the allegations

The question is not whether alcohol was present. It is whether the alleged victim was so incapacitated that consent was impossible. Those are very different things, and that difference can change the outcome of the case.

What Role Does Physical Evidence Play in Intoxication-Based Sex Crime Cases?

Toxicology results, medical records, and forensic evidence can all shape how the case is built and challenged. If the prosecution claims the alleged victim was severely intoxicated, the defense has several things to examine. Was any toxicology testing actually done? How much time passed between the alleged incident and when the testing occurred? And do the results actually support the level of incapacity the prosecution is claiming?

Schedule a Free Consultation With Our Walworth County, WI Sex Crime Defense Attorney

Sex crime cases involving alcohol or drugs are among the most complex cases in the criminal justice system. The Dodge County criminal defense lawyer at Bucher Law Group, LLC spent 20 years as the Waukesha County District Attorney. During that time, he litigated some of the most high-profile and complicated cases in the state of Wisconsin. He personally directed or handled dozens of homicide cases, hundreds of drunk driving offenses, and thousands of serious drug cases. That experience on the prosecution side means he knows exactly how these cases are built and where they can be taken apart. Call 262-446-9222 to talk about your situation and start building your defense today.