1. Accident reports.

Open, unless (a) an investigation is ongoing or actually contemplated and that investigation would be compromised if the records were released; (b) release of the records would likely deprive someone of a fair trial; or (c) release of the records would likely identify an confidential source.  See 5 ILCS 140/7(1)(d)(i), (iii), (iv).  The identities of witnesses to traffic accidents, traffic accident reports, and rescue reports are open, unless disclosure would interfere with an active criminal investigation conducted by the agency that is the recipient of the request. 5 ILCS 140/7(1)(d)(iv).