What the law does:
The law, called the Criminal Identification Act (20 ILCS 2630/5 et seq.), allows qualifying arrests, supervisions and convictions to be either expunged or sealed. Many people who have never been convicted can qualify to have their arrest record either expunged or sealed. Many misdemeanor, non-violent convictions can eventually be sealed. Two types of Class 4 felony convictions—possession of a controlled substance and prostitution—can be sealed 4 years after the sentence is completed. Only criminal records prosecuted and maintained by the State of Illinois are affected. Federal and out-of-state convictions do not fall under the new law.