Criminal Defense in Naperville
McMahon Law Offices defends residents and visitors facing criminal charges in Naperville. The vast majority of Naperville sits within DuPage County, meaning those cases are filed and heard at the DuPage County Circuit Court in Wheaton. A small portion of Naperville's southern boundary extends into Will County, where cases would be heard in Joliet instead. If you are unsure which county your arrest occurred in, contact us and we will advise you immediately.
We handle every category of criminal charge prosecuted by the DuPage County State's Attorney:
- DUI Defense — First offense, aggravated DUI, felony DUI, breathalyzer refusal, statutory summary suspension hearings, and commercial driver's license implications
- Drug Crimes — Possession, possession with intent to deliver, delivery of a controlled substance, trafficking, and cannabis charges
- Domestic Violence — Domestic battery, aggravated domestic battery, violation of orders of protection, and criminal stalking
- Violent Crimes — Assault, aggravated battery, armed robbery, home invasion, and attempted murder
- Property Crimes — Retail theft, burglary, residential burglary, criminal trespass, and criminal damage to property
- Sex Crimes — Criminal sexual assault, criminal sexual abuse, predatory criminal sexual assault, and sex offender registration matters
- Weapon Crimes — Unlawful use of a weapon, aggravated UUW, FOID card violations, and illegal firearm possession
- Traffic Violations — Reckless driving, driving on a suspended or revoked license, leaving the scene of an accident, and street racing
- White Collar Crimes — Fraud, theft by deception, identity theft, embezzlement, and money laundering
Your Naperville Defense Team
Every Naperville criminal case handled by McMahon Law Offices benefits from two perspectives that no other DuPage County firm can offer. One attorney prosecuted cases at the Wheaton courthouse. The other decided them from the bench. That combination gives every client a defense strategy built on both sides of the criminal process.
About Naperville
Naperville is one of the largest cities in Illinois, with a population of approximately 150,000 residents. Located roughly 28 miles west of downtown Chicago, it spans both DuPage and Will Counties, with the vast majority of the city sitting within DuPage County. Naperville consistently ranks among the wealthiest and most educated communities in the country and is known for its Riverwalk, its active downtown entertainment district, and its two large public high schools.
Despite its reputation, Naperville generates a substantial volume of criminal arrests. The downtown corridor along Chicago Avenue and Jefferson Avenue is one of the busiest bar districts in DuPage County. The city has a large commuter population traveling through I-88 and Route 59 daily. And its size means that Naperville PD is one of the largest municipal police departments in DuPage County, with active enforcement across all charge categories.
Cases arising in the DuPage County portion of Naperville are heard at the DuPage County Circuit Court in Wheaton. Cases arising in the Will County portion are filed in Will County Circuit Court in Joliet. If you are unsure which applies to your arrest, contact us and we will verify jurisdiction immediately.
Where Arrests Typically Occur in Naperville
Naperville is a large city with diverse enforcement activity. Several corridors and zones generate a disproportionate share of criminal arrests.
Downtown Naperville — Chicago Avenue and Jefferson Avenue
The downtown entertainment district is the single largest source of weekend arrests in Naperville. Dozens of bars and restaurants generate DUI stops, disorderly conduct charges, battery, and domestic battery calls on Thursday, Friday, and Saturday nights. Naperville PD runs targeted enforcement in this area and DUI checkpoints have been conducted on Chicago Avenue and nearby routes on high-traffic nights. If you were arrested leaving a downtown Naperville bar or restaurant, you are not alone — these cases are among the most commonly defended charges in DuPage County.
I-88 and Route 59
The Illinois State Police patrol I-88 extensively through the Naperville corridor. Route 59 is a primary north-south commercial corridor with active Naperville PD enforcement. Traffic stops on these routes regularly result in DUI arrests, drug possession discoveries, and weapon charges arising from vehicle searches. If your arrest occurred on I-88, the arresting agency is likely ISP, which affects how the stop was documented and processed.
Naperville Riverwalk and Park Areas
The Riverwalk and adjacent park system are active locations for open container violations, disorderly conduct arrests, and cannabis-related charges during warm months and weekend festivals. Large events on the Riverwalk, including the Ribfest and other summer gatherings, historically generate elevated arrest volumes for the Naperville PD.
Naperville North and Central High School Zones
The areas surrounding Naperville's two large high schools generate minor in possession of alcohol, cannabis possession, and disorderly conduct charges, particularly after school events and late at night. These cases typically involve individuals under 21 and move quickly through the system. A conviction at this age can affect college admissions, financial aid, and future employment background checks.
Residential Neighborhoods
Domestic battery and order of protection violations generate a steady volume of residential arrests throughout Naperville. These charges carry mandatory no-contact orders that take immediate effect upon arrest, often removing the accused from their own home before any court finding. Acting quickly with an attorney to address bond conditions is critical in domestic battery cases.
Where Naperville Criminal Cases Are Heard
Criminal charges arising in the DuPage County portion of Naperville are filed in the DuPage County Circuit Court — the 18th Judicial Circuit — located in Wheaton. This is the courthouse where McMahon Law Offices has practiced exclusively for over two decades.
DuPage County Circuit Court
- Address: 505 N. County Farm Rd, Wheaton, IL 60187
- Phone: (630) 407-8700
- Hours: Monday through Friday, 8:30 AM to 4:30 PM
- Circuit: 18th Judicial Circuit of Illinois
- Prosecuting Office: DuPage County State's Attorney's Office
- Distance from Naperville: Approximately 12 miles north via County Farm Rd
Bond court convenes the morning following arrest. If a family member was arrested overnight in Naperville, the first court appearance is likely the following morning in Wheaton. Having an attorney present at bond court can significantly affect the conditions of release, including the amount of bond set and any no-contact or travel restrictions imposed.
If your arrest occurred in the southern portion of Naperville near the Will County line, your case may be filed in Will County Circuit Court at 14 W. Jefferson St in Joliet. Contact us regardless — we can confirm jurisdiction immediately and advise you on next steps.
Law Enforcement in Naperville
Most criminal arrests in Naperville are made by the Naperville Police Department, one of the largest municipal departments in DuPage County. The Illinois State Police also have jurisdiction on I-88 and Route 59 and are a frequent arresting agency for DUI and traffic-related charges on those corridors. Knowing which agency made the arrest matters because each documents incidents differently, which affects the evidence your attorney will review.
Naperville Police Department
- Address: 1350 Aurora Ave, Naperville, IL 60540
- Non-Emergency: (630) 420-6666
- Jurisdiction: City of Naperville
Illinois State Police — District 5
- Address: 1011 Larkin Ave, Elgin, IL 60123
- Phone: (847) 294-4400
- Patrols: I-88, Route 59, and state routes through DuPage County
Frequently Asked Questions
My arrest happened in Naperville but I was told my court date is in Wheaton. Is that right?
Yes. All felony and misdemeanor criminal cases arising in Naperville's DuPage County jurisdiction are heard at the DuPage County Circuit Court at 505 N. County Farm Rd in Wheaton. Naperville has no courthouse of its own. The drive from Naperville to the Wheaton courthouse is approximately 12 miles north. If your case involved an arrest in the Will County portion of Naperville, it would instead be filed in Joliet.
I was stopped on I-88 in Naperville by the State Police. Does that change anything?
It can. Illinois State Police stops are documented differently than Naperville PD stops, and ISP officers follow distinct procedures for field sobriety tests, breathalyzer administration, and evidence collection. If the stop occurred on an interstate, the applicable legal standards for reasonable suspicion and search and seizure may differ from a standard municipal traffic stop. Your attorney will review the ISP arrest report and any dashcam footage as part of the defense strategy for a DUI or drug charge arising from that stop.
What happens to my driver's license after a DUI arrest in Naperville?
Under Illinois law, a DUI arrest triggers an automatic statutory summary suspension of your driver's license if you either refused the breathalyzer or tested at or above the legal limit. The suspension takes effect 46 days after arrest and is separate from any criminal penalties. You have the right to petition the court to rescind the suspension, but that petition must be filed promptly. Contact us immediately following a DUI arrest to preserve all available options.
I was arrested downtown after leaving a bar. Can the charge be beaten?
Potentially, yes. DUI charges arising from Naperville's downtown district often turn on the quality of the stop, the administration of field sobriety tests, and the calibration and operation of the breathalyzer device. If the officer lacked reasonable suspicion to stop your vehicle, or if the field sobriety tests were not administered according to NHTSA standards, evidence may be suppressible. These are fact-specific determinations that require a full review of the police report, dashcam footage, and breathalyzer records. Contact us for a free case review.
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