What Is the Predominant Aggressor in a Wisconsin Domestic Violence Case?

 Posted on August 29, 2026 in Criminal Defense

In a Wisconsin domestic violence case, the predominant aggressor is simply the person police decide was most responsible for what happened. This determination directly affects who gets arrested. This is true even when both people were involved in the confrontation.

If you've been arrested as the predominant aggressor in 2026, our Waukesha County, WI criminal defense lawyer can help you challenge this determination. Attorney Paul E. Bucher spent 20 years as the Waukesha County District Attorney. He personally directed or handled dozens of homicides, hundreds of drunk driving offenses, and thousands of serious drug cases. This gives him deep insight into how these determinations are made.

How Does Wisconsin Law Define the Predominant Aggressor?

Under Wisconsin Statute Section 968.075, the predominant aggressor is the most significant aggressor in a domestic abuse incident. They are not necessarily the first.

An officer has to make an arrest when there are reasonable grounds to believe someone committed domestic abuse that also counts as a crime. But there are more conditions to meet. One of these is that the person is the predominant aggressor. Police may also need to make an arrest if it looks like the abuse could continue, or if there's evidence the alleged victim was physically hurt.

Once police identify who the predominant aggressor is, Wisconsin law generally discourages arresting the other person. Because of this, officers have to look closely at the details of the incident. They can't just assume both people share equal blame.

What Factors Do Police Consider When Making a Predominant Aggressor Determination?

Officers generally look at several factors to identify the predominant aggressor, including:

• The relative severity of injuries between the parties
• Whether one person acted in self-defense
• Any history of domestic abuse between the individuals involved
• The potential for future injury, meaning whether one person appears to pose an ongoing threat to the other's safety

This assessment happens quickly, often in a stressful and chaotic environment, which unfortunately means mistakes can happen.

Can You Be Arrested Even if You Were Defending Yourself?

Officers responding to a domestic violence call often don't have much time to gather information before deciding who to arrest. Someone who was truly defending themselves might still get labeled the predominant aggressor. This can happen if their defensive actions left more visible injuries on the other person than what they got themselves.

This is one of the most frustrating parts of these cases. Getting wrongly labeled the predominant aggressor at the scene doesn't mean the state can actually prove a crime once all the facts come out.

How Can You Challenge a Predominant Aggressor Determination?

Common defense approaches to a domestic abuse charge include a few key strategies. One is showing self-defense evidence the officer didn't have at the scene. Another is gathering witness statements for a fuller picture of what happened. A third is obtaining medical records of your own injuries that may not have been documented at the time.

A closer look at the circumstances leading up to the incident often uncovers important context that police simply didn't have time to gather during their initial response. An attorney can dig into these details and build a defense that reflects the full story, not just what was captured in the moment.

Does Being Labeled the Predominant Aggressor Guarantee a Conviction?

A predominant-aggressor determination helps police decide whom to arrest during a domestic abuse investigation. It does not by itself prove that the arrested person committed a crime.

Wisconsin Statute Section 968.075 governs law enforcement procedures in domestic abuse cases. It does not create a separate crime of being the predominant aggressor. If criminal charges are filed, the state must still prove the elements of the specific offense beyond a reasonable doubt.

Evidence showing self-defense, conflicting witness accounts, or other problems with the state's case can still matter a lot, even after an arrest.

Schedule a Free Consultation With Our Milwaukee County, WI Domestic Violence Defense Attorney

Attorney Bucher was elected twice as President of the Statewide District Attorneys Association and served on dozens of statewide task forces addressing violent crime. Throughout his career, he has litigated some of the most high-profile and complicated cases in Wisconsin, handling thousands of cases from start to finish. If you have questions about your case, he's the right person to start with.

Contact Bucher Law Group, LLC at 262-446-9222 to schedule a free consultation with our Waukesha County criminal defense lawyer today.