*Source Data & Editor’s Note
Posted on January 27, 2013
We compile our own dataset using the following sources: Chicago Tribune, Chicago Sun-Times,
Homicide Watch Chicago (no longer updated), DNAInfo Chicago (out of business), Chicago Redeye Homicide Tracker (no longer updated), NBC5 Chicago, Chicago Tribune’s Shooting Tracker & Homicide Tracker, Cook County Medical Examiner, CPD’s Historical Data Set, City of Chicago Data Portal, Chicago Police Department Arrest Record Search and CPD CLEARMAP.
Editor’s note: All murders are homicides, but not all homicides are murders. We count homicides, whereas the CPD counts murders. A homicide, or a non-fatal shooting, regardless of type or by whom, within the city limits of Chicago counts towards our total metric, including anything on the expressways. CPD-involved, ISP-involved and justifiable homicides all count. Reckless homicides may count if the Medical Examiner rules that the cause of death was a homicide. Suicides do not count. Additional definitions can be found on the Glossary page.