Updated August 8, 2018 This dataset is a snapshot of the gang database maintained by the sheriff’s office and jail in Cook County, Illinois, along with other law enforcement agencies. Names and other personally identifying details have been removed, but the data includes information about the gender, appearance, gang affiliation, zip code, and race of the individuals listed. Additional information is also included, such as whether the individual wears gang colors or has tattoos, has self-identified their gang involvement, is under probation and more.