The Red Squad collection concerns surveillance of suspected “subversive” groups by the Chicago Police Department (CPD), circa 1930s-86 (bulk 1963-74). The collection also includes CPD’s Gang Unit files from the same time period, which contain information about similar surveillance conducted on gangs (and groups labeled as such) and on individuals allegedly affiliated with these groups. Please note, by court order, researchers are prohibited from disclosing information obtained from this collection about any person or organization without the express consent of that person or organization. More on the restrictions placed on access to these materials can be found in this guide. The ARC also holds the following related collections: