O’Fallon IL Felony Defense Lawyer

Felony charges in O’Fallon can lead to years in prison at facilities like St. Clair County Jail or even federal time at FCI Greenville. Whether you’re facing allegations involving violence, weapons, or serious drug offenses, an O’Fallon, IL felony defense lawyer can take steps to question the allegations made against you so you do not have to worry about facing the most serious penalties under the law.

Experienced Felony Defense for Clients in St. Clair County

Felony charges can lead to years in prison and a criminal record that follows you for life. At The Law Office of Jessica Koester, LLC, we build aggressive defense strategies focused on exposing weaknesses in the prosecution’s case.

Jessica Koester has spent decades defending clients throughout St. Clair County. She takes a strategic, trial-focused approach to protect her client’s rights, future, and freedom at every stage of the case.

Understanding Felony Charges in O’Fallon

Felony charges in O’Fallon often arise from violent, drug-related, or high-cost offenses. In 2023, the city recorded 49 violent crimes, including one murder. That same year, St. Clair County reported 691 drug and narcotic violations, which makes drug offenses among the most common in the area.

In April 2025, a fatal shooting left one woman dead and another injured in O’Fallon, prompting an intense homicide investigation. The projected cost of rape and sexual assault in the city for 2025 is estimated at $1.25 million, or $36 per resident, underscoring the deep financial and social impact of serious felony cases.

Defense Strategies for Serious Felony Cases

Serious felony cases in O’Fallon may stem from arrests near O’Fallon Sports Park or traffic stops along Highway 50. A strong defense starts with reviewing how the arrest and investigation were handled. Law enforcement cannot violate your fundamental rights when targeting or detaining you. They must have legal grounds for any steps they take.

Your attorney can challenge illegal searches, question the credibility of witnesses, and file motions to suppress evidence. If the case lacks solid proof, it may be possible to reduce or dismiss the charges. Every detail matters when building a defense in St. Clair County.

How an O’Fallon Felony Defense Lawyer Can Help

If you are facing felony charges after an arrest near O’Fallon Township High School or a neighborhood off Seven Hills Road, hiring a local defense lawyer is crucial. An O’Fallon felony defense attorney understands how St. Clair County prosecutors build their cases.

Local lawyers understand the local court system and the temperaments of judges and prosecutors in our city. Ms. Koester’s top priority is to see that you are shielded from the most serious penalties under the law.

Schedule Your O’Fallon Felony Defense Consultation Today

Felony charges in St. Clair County can lead to years of incarceration, steep fines, and a permanent criminal record that limits your opportunities for life. The steps you take now can greatly affect your case’s outcome.

At The Law Office of Jessica Koester, LLC, we can develop defense strategies tailored to the facts of your case. Our primary goal is to secure a favorable outcome that allows you to avoid serious penalties. Contact our office to arrange an initial consultation.