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How to expunge your record in illinois
Contact the law enforcement agency that arrested you.
The police precinct or county sheriff's department that arrested you will have a record of your initial arrest that will provide the name of the arresting officer and booking information. You'll need all of this information for your request to expunge or seal the record.
In most cases you can get this information for free, although it may take a trip down to the precinct or sheriff's office. You may be charged a small fee for a copy.