About Crime Reports
In this section of EveryBlock, you can find out about criminal activity near you, from robberies to homicides to prostitution.
The information comes from the Chicago Police Department and includes where and when each crime occurred, the case number, which primary and secondary "type" each crime falls under (see below) and the type of place where the crime occurred (in the street, at a residence, at a bar or tavern, etc.).
The information reflects incidents where the police responded and completed case reports. Note that a case report is not necessarily issued each time the police respond to a call. Also note that, though many case reports are the result of calls to 911, this data is not a list of 911 calls.
The information comes from Chicago Open Data portal, the crime mapping Web site of the Chicago Police Department. The data is updated each day, but the reports are about a week old. We at EveryBlock publish new reports daily.
Does every crime appear? And what are crime types?
The police's database doesn't include every crime. The police exclude crimes that are under investigation or reports that might compromise an investigation. Note also that though many case reports are the result of calls to 911, the police's data is not a list of 911 calls.
The "crime type" classifications are based on information known during the preliminary investigation, and they're sometimes revised later. For example, "Assault" could be changed to "Aggravated assault," or vice versa. When a crime type is revised in the source data, we update the record in place here at EveryBlock, but we make no indication that the crime type changed.
The police's crime classification codes come from the Uniform Crime Reporting (UCR) Program of the Federal Bureau of Investigation's National Incident-Based Reporting System (NIBRS). See the UCR Handbook for a complete listing and explanation of crime types.
The crime classifications are summarized due to the often lengthy and complex nature of crimes. These definitions are not verbatim, may not include every element of every offense, and shouldn't be used in a court of law or for legal reference. They're only basic attempts to describe primary classifications. See the Illinois Compiled Statutes for thorough and accurate definitions of the law or interpretations of the law. See also the City of Chicago Municipal Code.
The police department's Web site includes the following disclaimer about the data: "This data reflects crimes as reported to the police as of the current date, occurring during the selected date range for the selected area. These crimes are based upon preliminary information supplied to the Police Department by the reporting parties and have not been verified. The preliminary crime classifications may be changed at a later date based upon additional investigation and there is always the possibility of mechanical or human error. Therefore, the Chicago Police Department does not guarantee (either expressed or implied) the accuracy, completeness, timeliness, or correct sequencing of the information and the information should not be used for comparison purposes over time. The Chicago Police Department will not be responsible for any error or omission, or for the use of, or the results obtained from the use of this information."
- Source Chicago Police Department
- Updated Daily