Boulder DUI attorney

Charged with Driving Under the Influence (DUI)? You Need an Experienced Boulder Criminal Defense Lawyer

Facing a DUI or DWAI charge in Boulder understandably leads to anxiety. A conviction can impact your license, your career, your finances and your freedom. Working with an experienced Boulder DUI attorney gives you the defense and direction you need to move forward confidently with a focus on protecting your best interests.

At Dolan + Zimmerman LLP, we combine legal expertise, strategic planning, and personalized support to help clients protect their rights and secure their futures. We can help alleviate your anxiety if you or a loved one have been arrested on suspicion of drunk driving or driving while impaired in Colorado.

Why Choose A Boulder DUI Defense Attorney At Our Law Firm?

At Dolan + Zimmerman LLP, we know that no two DUI cases are alike. While there are standard defense strategies and structural legal formalities that apply to most cases, every case is unique. This is why experience is so important. Your defense attorney must be able to adapt to the unique qualities of each case. Our Boulder DUI attorneys provide legal defense by reviewing evidence, challenging police procedures, and negotiating with prosecutors to protect your rights and seek the best possible outcome for our clients. We also use our extensive experience to focus on dismissing charges, getting charges reduced and limiting penalties, and defending your driving privileges.

From arraignment to DMV hearings, we guide you through each stage of the process. Early representation enables us to initiate your defense promptly and enhance your chances of a more favorable outcome. We can offer you peace of mind, as we will examine every detail of your case and craft a defense strategy based on your unique circumstances and goals.

Our firm has decades of experience handling DUI and DWAI cases in Boulder County. We understand local procedures, we know the prosecutors and judges, and we use that insight to strengthen your case. We take the time to understand your situation and build a defense tailored to your needs.

What Are the Legal Limits for a DUI in Boulder, CO?

In Colorado, a DUI (Driving Under the Influence) means driving while you are substantially impaired by drugs or alcohol or both in your ability to operate a motor vehicle. A DUI often correlates with a blood alcohol concentration (BAC) of 0.08% or higher. There is also a separate charged called DUI Per Se that means driving while your BAC is 0.08% or higher. Still, a driver can be charged even with a lower BAC if an officer believes alcohol, drugs, or a mix of both impaired the person’s ability to drive safely.

What is DWAI in Boulder, CO?

DWAI, or Driving While Ability Impaired, is a lesser offense than DUI but still serious. A DWAI occurs when alcohol or drugs affect your ability to drive safely to the “slightest degree.” This typically applies to BAC levels between 0.05% and 0.79%. A conviction can result in fines, community service, jail, classes, and points being added to your license.

What Are the Consequences of a DUI OR DWAI Driving Conviction In Boulder?

While drunk driving charges are treated as petty offenses in some states, this is not the case in Colorado. In Colorado, driving under the influence is a criminal offense. While it is a misdemeanor in most cases, there are circumstances in which prosecutors can pursue felony charges.

The penalties for DUI and DWAI convictions depend on your BAC, prior offenses, and other factors. Consequences may include license revocation, hefty fines, probation, alcohol education classes, and jail time, among other penalties. Repeat offenses may carry harsher penalties and longer ignition interlock requirements, especially if they are close in time.

According to the Colorado Drunk Driving Laws Summary, 2025 laws continue to emphasize treatment programs and interlock devices for high-BAC and repeat offenders. While treatment programs are designed to support those who have been convicted, there are still many penalties for a DUI in Colorado that are strictly punitive. This is why having a defense attorney on your side is so critical. Colorado DUI penalties can be harsh, and they may have a long-term impact on your life. Helping you avoid such penalties is our goal.

Why Do I Need a Boulder DUI Defense Attorney?

Without a strong defense, a DUI conviction in Colorado can follow you for years. Our team reviews your arrest for errors and possible rights violations. We examine sobriety tests, the accuracy of testing equipment, and whether proper procedures were followed. Our goal is to protect your record and minimize or eliminate penalties through exposing flaws in the criminal charges against you and executing a rigorous defense of your rights.

How a Boulder DUI Lawyer Can Help You

When you choose our Boulder criminal law firm for your DUI case, we manage every step of your defense. This includes:

• Reviewing all police reports, body worn camera, and test data.
• Investigating procedural issues or legal violations related to your initial arrest.
• Challenging field sobriety tests and chemical tests (breath, urine, and blood tests).
• Exposing other issues with the prosecution’s case.
• Gathering evidence that supports your defenses.
• Negotiating to reduce or dismiss charges.
• Representing you in your criminal case and at separate DMV hearings.

Getting us involved early helps secure valuable evidence and prevent costly mistakes. Taking action early can make all the difference. The sooner we can investigate the circumstances surrounding your DUI arrest, the more we will be able to do to help protect you.

Importantly, you should not talk to the police or prosecutors without an attorney present. In criminal matters, it is up to you to protect yourself—and the police and prosecutors are not on your side. Whether you are eligible to hire a public defender depends on your financial status. If you are not eligible to hire a public defender, you will need to hire a Boulder DUI attorney in private practice.

We Have Defended Hundreds of DUI and DWAI Cases (Among Others)

Our firm has defended hundreds of DUI and DWAI cases across Boulder County and Colorado. We understand how local law enforcement operates and how to navigate the court system effectively. This experience enables us to effectively advocate for our clients and pursue the best possible outcomes.

Along with DUI offenses, we also handle cases involving reckless driving, drug offenses, domestic violence, sexual assault, and other crimes in Bounder County. As a result, we have a comprehensive understanding of the legal process in the Colorado courts, and we rely on this understanding to inform our clients’ defense strategies in DUI cases.

What are the Colorado DUI Laws?

Colorado law prohibits driving while under the influence or impaired by alcohol, drugs, or a combination of both. Being in control of a vehicle while under the influence or impaired in Colorado can lead to criminal and administrative penalties regarding your license. Refusing a chemical test may result in license revocation and the required installation of an ignition interlock device. As outlined in the Colorado DMV DUI Administrative Process, the state provides detailed information on administrative procedures and penalties following a DUI arrest. We are deeply familiar with these procedures and can offer guidance in even the most complex cases.

What To Do After a DUI Arrest in Boulder

After an arrest, you have only seven days to request a DMV hearing to challenge your license suspension. Do not discuss your case with law enforcement without legal counsel. Contact Dolan + Zimmerman LLP immediately so we can preserve evidence, protect your rights, and begin your defense.

Definition of Being in Control of a Motor Vehicle

In Colorado, being “in control” of a vehicle does not require driving. Sitting in the driver’s seat with the keys nearby may be enough to face charges. Additionally, many drivers are unaware that attempting to sleep in a parked car can still lead to arrest. Simply being in a car with the ability to operate it may be deemed “in control.”

Potential Defenses to DUI Charges

Every case is unique, and we build defenses tailored to the evidence and specific circumstances. We may dispute the legality of the stop, challenge testing procedures, or question probable cause. We also examine medical or environmental factors that may affect test results.

Contact a Boulder DUI Attorney About Your Case Today

DUI and DWAI charges can follow you for years, but you do not have to face these charges on your own. Taking action early can make a substantial difference in how your case unfolds. Our lawyers can provide the legal guidance you need, and we can use our knowledge of Colorado’s criminal justice system to help you fight to avoid a criminal record.

Contact a Boulder DUI lawyer at Dolan + Zimmerman LLP at (303) 593-1874 to schedule a private consultation and start taking steps to protect your rights and future.

Sydney Dolan

Founding Partner

Sydney Dolan has been a cornerstone of the Boulder legal community since 2012. As a founding partner, she brings extensive courtroom experience to every case, having led over fifty jury trials ranging from DUIs to first-degree murder. Combining her background in the public defender’s office with her reputation as an aggressive trial lawyer and sensitive negotiator, Sydney provides the intelligent, empowering advocacy necessary to navigate the most difficult legal journeys.

Free case consultation call us (303) 593-1874