About Us Serving communities throughout Central Illinois, Johnson Law Group addresses the legal needs of those facing a criminal charge. With 50+ years of collective experience under their belts, the firm has an in-depth understanding of the criminal justice system in Illinois. Their team includes former prosecutors and a former police officer. As a result, they devise defense strategies with an insight into the opposition’s mindset. Mark Johnson, the lead attorney at the firm was named by The National Trial Lawyers as a Top 100 Trial Lawyer. The firm works as a team, so you will always benefit from this experience as a client.