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  • Former Prosecutor · Cook County

Strategic Defense. Unwavering Protection.

When your freedom, your license, and your future are on the line, you deserve a defender who has stood on both sides of the courtroom. John Kopp brings prosecutor’s insight to every case.

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Former Prosecutor

Inside knowledge of how the state builds a case.

Trial-Tested Defense

Hundreds of cases taken to verdict across Illinois.

Kane County Focus

More than 17 years practicing criminal law in Kane County and beyond

17+ Years

1200+

Cases Defended

Clear, strategic defense tailored to your situation.

J. Kopp

Attorney at Law

About John Kopp

A Former Prosecutor Fighting for You.

I am John Kopp, a former prosecutor who now protects the rights of defendants. I offer individualized attention and a personalized approach to provide the best criminal, traffic, and DUI defense.

Many lawyers carry large caseloads and cannot offer you enough of their time. Not me. I put in the time to understand you, your concerns, and the unique facts of your case.
Cases Handled
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Trials
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years in criminal courts
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years in Kane County courts
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Practice Areas

Comprehensive Criminal Defense in Illinois.

DUI Defense

Just because you failed a sobriety test doesn’t mean the state can convict you. I challenge every stop, test, and procedure.

Protect your reputation and avoid the lifelong consequences of a domestic charge. Discretion and diligence, start to finish.
From possession to distribution, I scrutinize search and seizure to protect your freedom and your future.
Tickets and serious traffic offenses can threaten your license. I fight to keep you on the road.
A past conviction shouldn’t define you. I pursue expungement so you can move forward without the shadow of a record.
Lost your driving privileges? I guide you through the Secretary of State hearing process to get you back behind the wheel.

Defense

DUI Defense

Inside the Prosecution

A Former Prosecutor On Your Side Can Make a Difference.

Before establishing his own practice, John Kopp worked as a prosecutor for the Cook County State’s Attorney’s Office, where he handled criminal matters ranging from traffic offenses to first-degree murder.

Many of his cases involved preparing police officers for their testimony at trial. Through hundreds of trials, he gained a thorough grasp of police investigations, warrant executions, and arrest procedures — knowledge he now uses to evaluate how the prosecution will approach your case and build a strong defense.
He knows courtroom procedure. He knows criminal law. Don’t trust your case to a less-experienced lawyer.
  • Former prosecutor with the Cook County State's Attorney Office
  • Handled cases ranging from traffic offenses to first-degree murder
  • Prepared police officers and other witnesses for trial testimony in hundreds of cases.
  • Thorough grasp of police investigations, warrants, and arrest procedures
Trials Taken to Verdict
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“I know how prosecutors build a case — because I used to build them.”
That perspective is what separates a prepared defense from a reactive one. When the state sees that you have a former prosecutor in your corner, it changes the conversation.

Why Choose Me

Why Clients Trust Me.

Former Prosecutor Insight
I know how the prosecution thinks — and I use that knowledge to build stronger defenses.
Personalized Attention
You’re not a case number. I give every client the time and dedication their situation deserves.
Proven Trial Experience
From traffic offenses to first-degree murder, I’ve handled it all — and I’m ready to fight for you.

Testimonials

What My Clients Say.

“I really don’t write reviews, but I couldn’t help myself when it came to john. John should be awarded a ton more stars. My son and I are incredibly grateful to john Kopp, words cannot explain how much we appreciate him. Extremely competent and professional lawyer. He’ll go above and beyond and will do everything in his power to ensure you have the greatest possible result. A truly exceptional Lawyer.”

Zareena Ahmed

“I had a great experience with John. I wish I could give him more stars because he deserves it. John Kopp did an excellent job with my case he is very dependable, hard working and honest. He was able to get all my charges dismissed and my case was closed. John Kopp is the number 1 best attorney in Kane county I highly recommend anyone to hire him as there attorney. Thank you for your hard work John greatly appreciated!!!”

John Clark

“John is an excellent attorney. He handled my aggravated speeding case. He’s very confident, knowledgeable and responsive. John promptly answered my phone calls and emails. I feared the worst with the case , but he put me at ease and was able to negotiate an outcome of supervision on a lesser charge with a reasonable fine. I highly recommend John for your legal needs.”

Melissa Mihalcean

“I had a great experience working with John. He handled everything quickly and professionally, explained the process and the reasoning behind it clearly, and stayed to make sure everything was taken care of before I left. I really appreciated his professionalism, attention to detail, and willingness to go the extra mile. I’d highly recommend him to anyone looking for reliable legal assistance.”

Jack

  • Schedule at Your Convenience

Don’t Go Into the Courtroom Alone.

With flexible appointments and meeting spaces in Chicago and its western, northern, and southern suburbs, I’ll make it easy for you. Please include your name and the best number to reach you — your privacy matters, so I don’t recommend a work phone.
Request a Consultation
630-448-9053

Free & confidential first consultation.

Resources

Recent Articles & Legal Insights.

View All Articles
DUI Defense

What are Illinois DUI penalties for first, second, and third offenses?

Driving under the influence (DUI) is a serious offense in Illinois. The state has strict laws to deter impaired driving and protect public safety. If you face DUI charges, understanding the penalties is crucial. Here, we break down the consequences for first, second,…
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Criminal Defense

Can a past conviction affect my housing prospects?

Any person convicted of a crime can find it challenging to get back on their feet regardless of whether they committed a misdemeanor or felony. Even if they try to turn over a new leaf, they can face obstacles because of their criminal history, which can impact their…
Read More
Criminal Defense

Can I have my criminal record expunged?

Having a criminal record can make life difficult. It can stop you from getting a job, finding a place to live or traveling. But in some cases, you may be able to expunge or seal your criminal record in Illinois. Expungement erases the record while sealing it makes it…
Read More

Questions

Frequently Asked Questions.

Can I have my criminal record expunged?
Eligibility depends on the offense, the outcome, and how much time has passed. Many misdemeanor and some felony convictions can be expunged or sealed. I’ll review your record and tell you honestly what’s possible.
Stay calm, do not discuss the case with anyone but your attorney, and request a hearing on your license suspension promptly — there are strict deadlines. Contact me as soon as possible so we can protect both your license and your record.
Yes. The first consultation is free and confidential. We’ll discuss the facts of your situation and the options available to you, with no obligation.
Always. I personally handle my clients’ cases. You won’t be passed off to an associate or a paralegal — I’m the one reviewing your file and standing beside you in court.
I practice throughout Kane County and northern Illinois, including Geneva, St. Charles, Batavia, Aurora, and the surrounding communities.
Fees depend on the complexity of the case. After our consultation I’ll explain my fee structure clearly and in writing, so there are no surprises.

Contact

Schedule a Consultation at Your Convenience.

You shouldn’t go into the courtroom alone. Call my Geneva office or send me a message to schedule a consultation.

Phone

630-448-9053

Email

john@kopplawoffice.com

Office

422 W. State Street, Unit 110, Geneva, IL 60134

Free & confidential initial consultation. Serving Kane County and northern Illinois.

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