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Cook County Marijuana DUI Defense Lawyer
Understanding Marijuana DUI Charges in Cook County, Illinois

Cook County, home to Chicago and its surrounding suburbs, sees a high volume of DUI-related arrests, including those involving marijuana. Illinois law makes it illegal to operate a motor vehicle while under the influence of cannabis if it impairs the driver’s ability to operate the vehicle safely or if THC levels exceed the legal limit. Law enforcement actively pursues marijuana DUI cases, and individuals facing these charges need an aggressive defense strategy to protect their rights and future.
Under 625 ILCS 5/11-501, a driver is considered impaired if they have a THC concentration of 5 nanograms or more per milliliter of whole blood or 10 nanograms or more per milliliter of another bodily substance within two hours of driving. However, even without exceeding these limits, a driver may still be charged with a marijuana DUI if the prosecution can prove impairment based on observed behavior, field sobriety tests, and other forms of evidence.
Penalties for a first-time marijuana DUI conviction in Illinois can include fines up to $2,500, a license suspension, and possible jail time. If aggravating factors are present, such as a minor in the vehicle or causing bodily harm, the charges can escalate to a felony, carrying even harsher consequences.
How Marijuana DUI Cases Begin in Illinois
A marijuana DUI case typically starts with a traffic stop or an accident investigation. Law enforcement officers in Cook County look for signs of impairment such as bloodshot eyes, slowed reaction time, confusion, and the smell of cannabis. If an officer suspects impairment, they may conduct field sobriety tests and request a chemical test, such as a blood or urine analysis.
Unlike alcohol, marijuana metabolizes differently, making DUI cases involving cannabis more complex. THC can remain in a person’s system for days or even weeks, meaning a positive test does not necessarily indicate impairment at the time of driving. This is a crucial aspect of defending marijuana DUI cases, as the prosecution must establish that the driver was impaired while operating the vehicle, not merely that THC was present in their system.
The Arrest Process and Potential Penalties
If an officer believes a driver is impaired, they will arrest the individual and transport them to the local police station for processing. After the arrest, the driver may be held in custody until bond is posted or until a court appearance is scheduled. The severity of the charge will determine how the case proceeds.
A first-time offense is generally classified as a Class A misdemeanor, which carries potential penalties including:
- Up to one year in jail
- Fines up to $2,500
- Mandatory drug education programs
- Driver’s license suspension of up to six months
If a child was in the vehicle or an accident resulted in injury or death, the charge can escalate to a felony, leading to:
- Years of imprisonment
- Heavier fines
- Long-term license revocation
The Criminal Trial Defense Process for Marijuana DUI Cases
A marijuana DUI case proceeds through several legal stages, starting with the arraignment, where the defendant enters a plea. Pre-trial motions may challenge the validity of the arrest or the evidence collected. Defense attorneys frequently challenge the accuracy of field sobriety tests and chemical test results, arguing that they do not reliably indicate impairment.
If the case goes to trial, the prosecution must prove beyond a reasonable doubt that the defendant was impaired while driving. The defense may counter with expert testimony, challenge the reliability of the THC test results, and highlight inconsistencies in the arresting officer’s observations. Many cases are resolved before trial through negotiations that may result in reduced charges or alternative sentencing.
Types of Evidence in Marijuana DUI Cases
Prosecutors rely on multiple types of evidence to build a case, including:
- Officer testimony regarding erratic driving or unusual behavior
- Field sobriety test results
- Chemical test results from blood or urine samples
- Video footage from dashcams or body cameras
- Eyewitness statements
However, these pieces of evidence can be challenged, particularly because field sobriety tests are subjective, and THC levels do not always correlate with impairment.
The Benefits of Hiring a Criminal Defense Attorney
A strong legal defense is critical when facing marijuana DUI charges in Cook County. An attorney can:
- Analyze the prosecution’s evidence for weaknesses
- Challenge the legality of the traffic stop
- Contest the reliability of chemical tests
- Represent the client in court and during negotiations
Given the severe consequences of a DUI conviction, hiring an experienced criminal defense attorney increases the likelihood of a favorable outcome, whether through case dismissal, reduced charges, or an acquittal.
Potential Defenses to a Marijuana DUI Charge
Several defense strategies may apply in a marijuana DUI case, including:
- Challenging the traffic stop if the officer lacked probable cause
- Disputing the chemical test results due to faulty equipment or improper testing procedures
- Arguing lack of impairment by presenting expert testimony on THC metabolism
- Questioning the officer’s observations if the signs of impairment could be attributed to other factors, such as fatigue or medical conditions
What to Look for in a Criminal Defense Attorney
When facing criminal charges, defendants should seek an attorney with:
- Extensive experience handling DUI cases
- A strong track record of successful outcomes
- In-depth knowledge of Illinois DUI laws
- The ability to aggressively challenge prosecution evidence
Questions to Ask a DUI Attorney During a Consultation
- How many marijuana DUI cases have you handled?
- What defense strategies do you recommend for my case?
- How will you challenge the prosecution’s evidence?
- What potential outcomes should I expect?
Why You Need an Attorney for Marijuana DUI Charges
Attempting to handle a marijuana DUI case without legal representation is a serious mistake. The legal system is complex, and prosecutors aggressively seek convictions. Without an attorney, defendants risk harsh penalties that could have been mitigated or avoided altogether.
The Law Offices of David L. Freidberg has decades of experience defending individuals against DUI charges in Cook County and the surrounding areas. Our firm fights tirelessly to protect clients’ rights and secure the best possible outcomes.
Call The Law Offices of David L. Freidberg for DUI Defense in Cook County
If you or a loved one has been charged with a marijuana DUI in Cook County, Illinois, do not wait to seek legal help. The Law Offices of David L. Freidberg provides aggressive and knowledgeable defense representation for individuals facing serious criminal charges.
A DUI charge in Cook County can have long-term consequences that extend beyond the courtroom. The Law Offices of David L. Freidberg provides aggressive and knowledgeable legal representation for individuals facing DUI charges. Our team is committed to protecting our clients’ rights and minimizing the impact of a DUI on their lives.
If you are facing DUI charges in Cook County or anywhere in Chicago, the right legal representation can make all the difference. The Law Offices of David L. Freidberg provides aggressive legal representation for those accused of drunk driving in Cook County and throughout Illinois. We offer free consultations 24/7 to discuss your case and legal options. Contact us today at (312) 560-7100 or toll-free at (800) 803-1442 for dedicated defense in DuPage County, Cook County, Will County, Lake County, and the greater Chicago area.