FOIA: Calls for Service 2020 Data

This request for what is traditionally called calls for service data covers the year 2020. This data is generated every time someone calls 911 seeking police services. The Office of Emergency Management and Communications (OEMC) receives these calls and generates the data.

We have been engaged with the Office of Emergency Management & Communications (OEMC) since 2016 trying to open their data. Our data warehouse now has meta data on calls for service dating back to 1999.. We won access to this data through a settlement with OEMC in Cook County Circuit Court.

We have obtained data on millions of additional calls for police service from the Chicago Police Department who maintains historical data from OEMC dating back to 1999. We are still fighting the CPD in court as the amount of calls turned over to us in the 18 years we requested from them has ranged from as little as 13% of what is listed in their annual report to almost 190% of what was listed. Much work remains to get a cohesive and legitimate data set from the CPD.

Here is the text of our FOIA:

4/2/21 – In accordance with the Illinois Freedom of Information Act please provide the following records:

A. All call for police service data for the time frame of 1/1/20 – 12/31/20. Please make sure to include all data fields listed in the attached document including the following: 

  • Cross Type Flag
  • Disperid
  • Descr
  • EntryPersid
  • Location- location of event
  • Location-deployment location
  • Location- callerlocation
  • LocHiCross
  • OnsDate *
  • Place Name
  • Radio
  • Segmentld
  • Text
  • UnitClass
  • UpdPersid
  • UpdWksName
  • Use
  • XCoord
  • YCoord
  • Vehicle
  • Ward
  • ZipCode

For the fields of LocHouseNumber & CallerLocHouseNumber please reduce the addresses to the hundred block – so a address of 2004 w Roscoe would be reduced to 2000 W. Roscoe.

Please contact us about fulfilling this FOIA or with any questions you might have by responding to this email. 

Tracy Siska

Tracy has nearly two decades of experience researching and working within criminal justice systems. When Tracy began pursuing a career dedicate to system reform, he found that no single organization existed to promote evidence-based discussions among law enforcement agencies and the communities they serve. Recognizing that citizens in Chicago deserved the right to demand transparency in their criminal justice system, Siska established the Chicago Justice Project. He received his Master of Arts degree in Criminal Justice at the University of Illinois at Chicago.

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