What Are the Stages of a DUI Case in Illinois?

 Posted on August 27, 2026 in Car Accidents

From the initial traffic stop to the final sentence, a charge of driving under the influence (DUI) can move very quickly. Without legal representation at your side, it can be difficult to understand what is going on, leaving you at risk of making mistakes that could hurt your case. For advice and representation, reach out to a Joliet, IL DUI defense attorney today.

At McNamara Phelan McSteen, LLC, we approach every DUI case with a strategy tailored to the client’s needs and priorities. We have over a century and a half of experience, with a team of attorneys equipped to handle various criminal defense cases.

What Are the Stages of a DUI in 2026?

A DUI charge in Illinois moves through several stages. Each part of the process carries its own risks and deadlines. Knowing what to expect can help you make better decisions and protect your rights along the way.

The Traffic Stop

Most DUI cases begin with a traffic stop. An officer may pull you over for speeding, weaving, a broken taillight, or another minor issue. Once you are stopped, the officer will watch for signs of impairment, such as slurred speech, the smell of alcohol, or slow reactions. You may be asked to perform field sobriety tests or take a breath test. You have a right to refuse field sobriety tests and roadside breath tests.

These tests are not always reliable. Nervousness, medical conditions, or uneven pavement can affect a driver’s performance. You are not required to answer questions about where you have been or how much you have had to drink. Staying calm and polite, while avoiding unnecessary statements, can help protect you later in the case.

After the Arrest

If the officer has probable cause to believe that you were driving under the influence, you will be taken into custody and processed. You will likely be asked to take a chemical test to measure your blood alcohol content. Refusing this test or failing it can lead to an automatic suspension of your driving privileges, separate from any criminal penalties. Once you have been processed, you are usually released with certain conditions.

Detention Hearing

Illinois no longer uses cash bail because of the Pretrial Fairness Act. In most DUI cases, a person is released with conditions after his or her arrest, and no detention hearing takes place. However, certain aggravated DUI charges can qualify for pretrial detention (725 ILCS 5/110-6.1). In that case, the judge will look at the facts of the case to determine whether you pose a risk to public safety.

Your attorney will have a chance to respond to the petition and argue for your release before the judge makes a decision.

Arraignment

At an early court appearance, the judge will explain the charges against you, and you will enter a plea, usually "not guilty." It is important to have a DUI defense attorney with you at this stage, since decisions made early in a case can affect everything that follows.

License Hearing

A DUI arrest can also trigger action from the Illinois Secretary of State's office, which handles driver's license suspensions separately from the criminal case. You can request a hearing in circuit court within 90 days of receiving notice of the suspension to challenge it. This hearing focuses only on your driving privileges, not on guilt or innocence. Missing the deadline can leave you without a valid license for longer than necessary.

Preparing for Trial

Once the early stages of your case are complete, your attorney will begin building your defense. This often includes reviewing police reports, squad car and body camera footage, breath or blood test results, and witness statements during discovery. Your attorney may also file motions to suppress evidence if the stop, arrest, or testing process violated your rights.

This stage can also involve working with outside experts to review testing equipment, calibration records, or medical factors that could explain the results of a breath or blood test. Pre-trial preparation is often the most important part of a DUI case, since strong evidence gathered early can shape the outcome later.

Going to Trial or Entering a Plea

Most DUI cases end in one of two ways: trial or a plea agreement. A trial allows a judge or jury to hear the evidence and decide guilt or innocence. A plea agreement, on the other hand, involves negotiating with the prosecutor to resolve the case without a trial, often in exchange for reduced charges or a lighter sentence. The right choice depends on the strength of the evidence, the specifics of the arrest, and your goals for the outcome. An attorney can help you weigh the risks and benefits of each option.

What Happens After a DUI Case Is Over?

Once a criminal DUI case concludes, the next steps depend on the sentence. Some drivers in a first DUI receive court supervision, which can allow them to avoid a conviction on their record if they meet certain conditions. Others may be placed on probation, which can include check-ins, fines, and required classes.

Depending on the case, a person can also face fines, license suspension, community service, or mandatory treatment programs. Every case is different, and the specific requirements depend on the facts involved and any prior history.

How Early Should I Contact an Attorney in a DUI Case?

The earlier you contact an attorney after a DUI arrest, the more time your attorney has to protect your rights. An attorney can help you prepare for your initial appearance, argue for your release at a detention hearing, and protect your driving privileges before Secretary of State deadlines pass.

Waiting too long can mean missed opportunities to challenge evidence or preserve your license. If you have been arrested for a DUI, contacting an attorney as soon as possible gives your defense the best chance to succeed.

Contact Our Will County, IL DUI Defense Attorneys

A DUI arrest can leave you worried about your future. At McNamara Phelan McSteen, LLC, we understand how consequential this process can be, and we are ready to guide you through each stage of your case. Contact our Joliet, IL criminal defense lawyers or call 815-727-0100 to set up a free consultation.