The Illinois State Police on Friday issued a response to Gibbons' letter. The state police, along with the Illinois Association of Chiefs of Police and the Illinois Sheriff's Association, say they will continue to enforce state law which prohibits the carrying of "an immediately accessible firearm on your person or in your vehicle regardless of whether it is concealed." Violating the law can result in an arrest.
The Madison County Mines Superfund site is part of the Old Lead Belt, where the mining of heavy metals began in the 1700s. The nearly 500-square-mile area is contaminated by lead, a highly-toxic metal that can wreak havoc on organs and tissues in the human body.