Criminal Defense Lawyer in Belleville, IL
Fierce Defender


Former Prosecutor

You Get Erin

50+ Trials
Belleville Criminal Defense Lawyer
Getting arrested doesn’t just mean facing criminal charges. Those criminal charges threaten your career, family, and freedom. Whether you were arrested on suspicion of DUI, violent crimes, drug charges, theft, or violent crimes, you need a Belleville criminal defense attorney to help you fight back against the prosecution.
The Conner Law Firm provides aggressive criminal defense representation in Belleville and St. Clair County, Illinois, led by former prosecutor Erin K. Conner who brings 15+ years of trial experience and insider knowledge of how the prosecution builds its case. Our understanding of what happens on the prosecution side of things is an asset we use to build a strong defense to fight these charges and preserve your freedom.

“I’ve sat on both sides of the courtroom. I know how prosecutors build their cases, and I know how to take them apart. When your future is on the line, you deserve someone who will fight like it’s personal — because to me, it is.”





Why Choose a Former Prosecutor for Your Defense?
Choosing a defense attorney is a smart move when facing any kind of criminal charge. Even smarter, choosing a former prosecutor gives you distinct advantages over choosing other defense lawyers:
- Insider Insight and Strategy: Only a former prosecutor knows how other prosecutors think and function. They can anticipate their strategies and pinpoint weak areas in a case.
- Case Evaluation: Defense attorneys who served on prosecution can quickly analyze a case to find any flaws in evidence or procedural errors police have made, which could lead to charges being dropped.
- Trial and Courtroom Experience: Having handled numerous cases on the prosecution side, they are seasoned at trial and comfortable in the courtroom.
- Negotiation Skills: Former prosecutors often have established relationships with law enforcement and other prosecutors, which can often work out with favorable plea negotiations.
- Anticipating Tactics: These defense lawyers know the pressure current prosecutors face and how they decide to bring charges, allowing for proactive, strategic preparation of defense.
Erin K. Conner spent 8 years as an ASA in St. Clair County, including supervising the Violent Crimes Unit. As a former prosecutor with trial experience, she charged hundreds of cases. This inside knowledge of how prosecutors build their case has shaped the way she provides defense to the accused.
She has insider knowledge of plea negotiation strategies, evidence weaknesses, and courtroom tactics. Now with over 50 trials to verdict with countless acquittals, she knows how to bring aggressive defense to help her clients.
When facing criminal charges, hiring a Belleville criminal defense lawyer is essential. Don’t rely on a public defender who is overburdened with cases or an attorney who doesn’t know the ins and outs of how prosecution works from the inside. Choose the Conner Law Firm to get the strongest defense against these charges.
Criminal Defense Practice Areas
We Handle

DUI Defense

Violent Crimes

Domestic Violence

Sex Offenses

Weapons Charges

Drug Crimes

Theft and Property Crimes

Misdemeanors

Traffic Offenses

Juvenile Defense
If you or a loved one are facing criminal charges in Belleville and St. Clair County, IL, get the aggressive defense you need backed by former prosecutor knowledge from Erin K. Conner to protect your legal rights.
Facing Criminal Charges in St. Clair County or Southern Illinois?
Don’t wait. The earlier you have an experienced defense attorney reviewing your case, the stronger your position.
How Our Criminal Defense Process Works
Here is what you can expect from our criminal defense process:
Free, Confidential Consultation
Contact The Conner Law Firm for a free consultation that is always completely confidential. We will review your charges, conduct an evidence review, and look for options in your defense.
Investigation
After a thorough evidence review of what the prosecution has, your Belleville criminal defense attorney interview witnesses, review police reports, and gather any additional evidence that could help reduce charges or even fully clear your name.
Pre-Trial
Motions
Certain evidence may have been obtained unlawfully, and we can file motions to have it suppressed, which may even work to dismiss these charges.
Negotiation or
Trial
Whether a plea deal is in your best interest or seeing what the verdict is at trial, The Conner Law Firm always works to pursue your best possible outcome.
When you choose The Conner Law Firm, you’re not leaving anything to chance. Many firms pawn you off on a paralegal or associate. Here, you get Erin herself to defend you, armed with her extensive knowledge from working on the prosecution side to level the playing field.
Criminal Defense Case Results in St. Clair
County & Southern Illinois
Client faced life in prison. Cross-examination exposed inconsistencies in the state’s timeline.
Client faced life in prison. Cross-examination exposed inconsistencies in the state’s timeline.
Client faced life in prison. Cross-examination exposed inconsistencies in the state’s timeline.
Client faced life in prison. Cross-examination exposed inconsistencies in the state’s timeline.
Client faced life in prison. Cross-examination exposed inconsistencies in the state’s timeline.
Disclaimer: Past results do not guarantee future outcomes. Each case depends on its own facts and circumstances.
Belleville Criminal Defense Attorney As Seen In The News






Why Belleville Clients Choose The
Conner Law Firm LLC
You Get
Erin
When you retain The Conner Law Firm LLC, you retain Erin. No farming to associates, paralegals, or staff. She handles every step — consultation, hearings, discovery, court dates, negotiations, plea, trial, sentencing.
Former
Prosecutor
Nearly a decade as a prosecutor in St. Clair County. Rose to Supervisor of the Violent Crimes Unit and Chief of the Criminal Bureau. Knows how cases get charged and how the state prepares for trial.
Local
Advantage
Lifelong Belleville resident who knows the judges, prosecutors, and diversionary programs — Drug Court, Veterans Court, Mental Health Court, Second Chance Probation, and more.
Integrity &
Reputation
When Erin files a motion, prosecutors know it’s not boilerplate — she’s analyzed the facts and believes she has a winning argument. Also honest with clients about realistic outcomes.
Elite
Communicator
Competitive speaker since age 10. Four-time national champion in Speech & Debate. Thrives in front of judges and juries — articulate, persuasive, and impossible to ignore.
Talk to a Belleville Criminal Defense Lawyer Now
Prosecutors start building their case the moment you’re arrested. Get Erin on your side now.

Proven Criminal Defense Record — 50+ Trials to Verdict
- 50+ — Cases Tried to Verdict (murder, armed robbery, DUI, sex offenses, domestic violence, weapons)
- 15+ — Years as Prosecutor & Defense Attorney
- Countless — Acquittals, Dismissals & Favorable Dispositions



What Follows the Charge Defines the Outcome.

What Our Criminal Defense
Clients Are Saying
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St. Clair County
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Madison County
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St. Clair County
Your Case Deserves / Undivided Attention
Meet Your Belleville Criminal Defense Attorney
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Counties and Courts We Serve
Recently arrested and accused of a crime? It’s not just the kind of attorney you choose to come to your defense. Where they work truly matters for understanding the jurisdiction.
The Conner Law Firm represents those facing criminal charges in Belleville, which is part of the St. Clair County Circuit Court. Erin has extreme familiarity with this area as well as Monroe County, Randolph County, Perry County, Washington County, Madison County, and Bond County.
She additionally represents clients from Southern Illinois to Metro East in Clinton, Fayette, Franklin, Jefferson, Jersey, Macoupin, Sangamon, and Williamson. Whether you’re out on bond or you have one phone call to make, the smart move is contacting Erin K. Conner who knows these areas inside and out and brings former prosecutor knowledge to every case she defends.
Illinois Criminal Defense Blog — Legal
Insights from a Former Prosecutor
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Frequently Asked Questions
How much does a criminal defense lawyer cost in Belleville?
Fees for a criminal defense lawyer in Belleville will vary widely in the area and are often lower for misdemeanors. Many defense attorneys in Belleville can provide payment plans to help get the representation you need. Erin K. Conner offers a free consultation that allows you to learn about how she can provide a strong case strategy while giving you a breakdown on the costs.
What should I do if I’m arrested in St. Clair County?
If you are arrested in St. Clair County, you should protect your rights by keeping silent. The only questions you are required to answer are providing basic identifying information. After that, politely and clearly state that you are going to remain silent and that you want a lawyer.
Never consent to a search unless the police have a warrant, and never try to clear things up or argue your way out of something. It doesn’t matter if you’re innocent and trying to help – always contact a lawyer immediately as the key to protecting your rights and potentially avoiding prison and fines is always early, aggressive legal representation to guide you through the St. Clair County legal system.
Can a former prosecutor really help my defense?
Yes, you gain many strategic advantages by hiring a former prosecutor in your criminal defense. Erin K. Conner brings deep insider knowledge of the St. Clair County courts and how the state builds cases, looking for weak spots and procedural errors that otherwise may go unnoticed. She’s also familiar with local judges, prosecutors, and courtroom staff, which tends to allow for better plea negotiations. The respect Erin has earned runs deep with those in the local court system, positively influencing how your case is handled.
What is the difference between a misdemeanor and a felony in Illinois?
In Illinois, a misdemeanor is not something you want on your criminal history, though it is a less serious offense than a felony. If convicted, you may face a maximum of 12 months in jail, and fines can range from $1,500 to $2,500 depending on whether it is a Class A, Class B, or Class C misdemeanor.
Felony charges are far more serious and can result in being sent to a state penitentiary for a year or more. Felonies are more likely to carry long-term life-altering consequences such as the loss of your rights and can impact your career and social standing.
Any type of conviction has the potential to cause you job loss, especially if your career requires a professional license. You may not be able to find a suitable place to rent, be approved for a loan, or have other consequences that go beyond the punishments of these charges.

Contact The Conner Law Firm for Your Defense
Facing criminal charges after an arrest can be an uncertain time where your future and freedom remain in questions. Get the answers you need through strong representation with The Conner Law Firm, providing aggressive criminal defense representation in Belleville and St. Clair County, Illinois.
Led by former prosecutor Erin K. Conner, your strategic defense is backed by her over 15 years of trial experience and insider knowledge of how prosecutors build their cases. The Conner Law Firm fights for your rights in every courtroom in Southern Illinois. Do not wait another minute to get the legal representation you need to work toward a favorable outcome. Call us today at 618-277-2421 to schedule a free consultation with a Belleville criminal defense lawyer from our team.

