Experienced Former


Chicago Criminal Defense Attorney

Chicago Criminal LawyerIf you or a loved one has been charged with a crime, you need an experienced  criminal attorney on your side. With over 20 years experience, former prosecutor Gus Kostopoulos will aggressively protect your freedom.

Before becoming a criminal defense attorney, Gus served as an Assistant State’s Attorney. As a prosecutor, he was in charge of a team of prosecutors and handled thousands of cases. Gus uses this experience to help his clients achieve the best possible outcome.

Gus Kostopoulos – Chicago Criminal Lawyer with 20 Years Experience

If you’ve been arrested or under investigation in the Chicagoland area, then call our law firm today to find out how we can help. We handle all criminal matters ranging from misdemeanors and DUI, to felonies like sex crimes and homicide. We are available throughout Cook County and Illinois.

After an arrest, you may feel like you’ve lost control of your life. Gus can help you get your life back by protecting your rights and attacking the prosecution’s case against you. Call us 24/7 for a free consultation.

How a Former Prosecutor Can Help Protect Your Freedom

As a former prosecutor, Gus has knows how the prosecution builds a case against you. He knows how they investigate your case, the tactics they use to pressure you into accepting a plea deal, and more importantly, what shortcuts they take. This allows him to challenge every aspect of the prosecution’s case against you.

Gus prides himself on an aggressive pre-investigation process. His goals is to minimize the charges or get them dismissed altogether. Instead of giving the prosecution time to build a case against you, Gus starts working on your case from the moment you hire him. From day one, he

  • Reviews the evidence,
  • Reaches out to the detectives investigating your case, and
  • Challenge any evidence collected by the prosecution.

Visit our Chicago, IL Criminal Law Office

Kostopoulos Law Group is located at 125 Wacker S Wacker Drive Suite 300 A, Chicago, IL 60606.

Free consultation - 24/7




Cook County Court: Client charged with domestic battery. During cross-examination, Gus was able to show that the accuser’s testimony was not credible. RESULT: The court ruled for our client and dismissed the case. TRIAL VICTORY.

Cook County Court: Our client was charged with distribution of a controlled substance. Our client was facing a lengthy prison sentence and steep fines. RESULT: After a lengthy trial, the court returned a NOT GUILTY verdict. TRIAL VICTORY.

Cook County Court: Client charged with DUI. Our client was accused of causing an accident, failing all Field Sobriety Tests and blowing more than twice the limit (.186). Gus challenged the breathalyzer results and pointed out the errors in the field sobriety test. RESULT: Found NOT GUILTY at trial. TRIAL VICTORY.

Defense Attorney with Trial Experience

If your case must go to trial, then you need a lawyer with a proven track record of trial victories. Both as a former prosecutor and criminal attorney, Gus has established himself as a successful courtroom litigator who can take a case before a jury and win.

His courtroom skills serve you well in and out of the courtroom. This is because the prosecution is more likely to offer a favorable plea agreement if they know that you’re represented by an experienced litigator. Don’t face criminal charges on your own. Find out how we can assist you so you can get back to your life.

When facing criminal charges, the quality of your legal representation will impact the outcome of your case. Kostopoulos Law Group will use its unparalleled experience to help you achieve the NOT GUILTY verdict you deserve.


Attorney Profile

Gus Kostopoulos is an experienced attorney who has successfully litigated thousands of criminal cases. He has earned a reputation as a tough attorney who achieves outstanding results.



Aggressive Pre-Trial Strategy

We begin to work on your case from the moment you hire us. That includes:

Investigating the crime scene

Examine evidence and interview witnesses

Reach out to the detective
investigating your case

Communicate to with the prosecutor’s office to have the charges reduced or dismissed

What our clients
are saying

“My family’s lawyer told me that you are top criminal defense lawyers.

You won my felony hearing and got my felony completely dismissed! Thank you for your hard work and excellent results.”


We are available 24/7 to take your call. Contact us before speaking to the police about your case. Remember, the police have one goal in mind – to get information from you that they can use against you at a later time.

We have offices throughout Chicago to assist you.

18W140 Butterfield Rd Suite 1504,
Oakbrook Terrace, IL 60181

(630) 283-8024

Servicing Chicago, Cook County, and
the surrounding areas.

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