The cost of a Police report in Illinois typically ranges from $6 to $20, depending on the how you obtain it. You will likely need to provide information such as the report number, your name, drivers license number, vehicle plate number, the date/time of accident, location of accident, who was involved in the accident, your mailing address, phone number, and email. For more information, you can visit http://www.knoxcountysheriffil.com/.