Strategic Subject List

data.cityofchicago.org | Last Updated 7 Dec 2017

The information displayed represents a de-identified listing of arrest data from August 1, 2012 to July 31, 2016, that is used by the Chicago Police Department’s Strategic Subject Algorithm, created by the Illinois Institute of Technology and funded through a Department of Justice Bureau of Justice Assistance grant, to create a risk assessment score known as the Strategic Subject List or “SSL.” These scores reflect an individual’s probability of being involved in a shooting incident either as a victim or an offender. Scores are calculated and placed on a scale ranging from 0 (extremely low risk) to 500 (extremely high risk). Based on this time frame’s version of the Strategic Subject Algorithm, individuals with criminal records are ranked using eight attributes, not including race or sex. These attributes are: number of times being the victim of a shooting incident, age during the latest arrest, number of times being the victim of aggravated battery or assault, number of prior arrests for violent offenses, gang affiliation, number of prior narcotic arrests, trend in recent criminal activity and number of prior unlawful use of weapon arrests. Please note that this data set includes fields that are not used to calculate SSL, for example, neither race nor sex are used in the Strategic Subject Algorithm. Portions of the arrest data are de-identified on the basis of privacy concerns. The attributes used in the Strategic Subject Algorithm are updated as the model is revised on an ongoing basis. The data set below will be updated periodically to reflect these revisions.

Tags: crime, police

This dataset has the following 48 columns:

Column NameAPI Column NameData TypeDescriptionSample Values
SSL SCOREssl_scorenumberStrategic Subject List Score.
PREDICTOR RAT AGE AT LATEST ARRESTpredictor_rat_age_at_latest_arresttextAttribute RAW Score; The raw score calculated by the model; The individual's age at the time of their most recent arrest.
PREDICTOR RAT VICTIM SHOOTING INCIDENTSpredictor_rat_victim_shooting_incidentsnumberAttribute RAW Score; The raw score calculated by the model; The number of times an individual has been the victim of a shooting.
PREDICTOR RAT VICTIM BATTERY OR ASSAULTpredictor_rat_victim_battery_or_assaultnumberAttribute RAW Score; The raw score calculated by the model; The number of times an individual has been the victim of an aggravated battery or aggravated assault; .
PREDICTOR RAT ARRESTS VIOLENT OFFENSESpredictor_rat_arrests_violent_offensesnumberAttribute RAW Score; The raw score calculated by the model; The number of times the individual has been arrested for a violent offense.
PREDICTOR RAT GANG AFFILIATIONpredictor_rat_gang_affiliationnumberAttribute RAW Score; The raw score calculated by the model; Indicator if an individual has been confirmed to be a member of a criminal street gang. 1=Yes; 0=No
PREDICTOR RAT NARCOTIC ARRESTSpredictor_rat_narcotic_arrestsnumberAttribute RAW Score; The raw score calculated by the model; The number of times the individual has been arrested for a narcotics offense.
PREDICTOR RAT TREND IN CRIMINAL ACTIVITYpredictor_rat_trend_in_criminal_activitynumberAttribute RAW Score; The raw score calculated by the model; The trend of an individual's recent criminal activity.
PREDICTOR RAT UUW ARRESTSpredictor_rat_uuw_arrestsnumberAttribute RAW Score; The raw score calculated by the model; The number of times the individual has been arrested for Unlawful Use of Weapons.
SEX CODE CDsex_code_cdtextSubject's Sex as of their latest arrest record.
RACE CODE CDrace_code_cdtextSubject's Race/Ethnicity as of their latest arrest record: BLK - Black; WHI - White; API - Asian/Pacific Islander; WBH - Black Hispanic; WWH - White Hispanic; I - American Indian/Alaskan Native; U - Unknown
WEAPON Iweapon_itextIs 'Y' if at least one Weapon (UUW) Arrest in past 10 years.
DRUG Idrug_itextIs 'Y' if at least one Drug Arrest in past 10 years.
AGE GROUPage_grouptextSubject's Age as of their latest arrest record.
AGE TOage_totextIf Age is an estimated range, this is the upper end of that range
STOP ORDER NOstop_order_nonumberIf an outstanding investigative alert exists for this subject, this is the Investigative Alert (previously known as Stop Order) number.
PAROLEE Iparolee_itextIs 'Y' if the subject is matched with a recent Illinois Department of Corrections Record indicating the subject is currently on Parole.
LATEST DATElatest_datenumberLatest date of police contact.
LATEST DISTlatest_distnumberPolice District in which latest contact occurred.
MAJORITY DISTmajority_distnumber
DLSTdlsttextState of issue for Latest of entry of Subject's Drivers License Number (if any) found in any arrest record.
LATEST DIST RESlatest_dist_resnumberDistrict of Residence as of the subject's latest arrest record.
WEAPONS ARR CNTweapons_arr_cntnumberCount of Weapons (UUW) Arrests in last 10 years.
LATEST WEAPON ARR DATElatest_weapon_arr_datenumberDate of Latest Weapons (UUW) Arrest .
NARCOTICS ARR CNTnarcotics_arr_cntnumberCount of Drug Arrests in last 10 years.
LATEST NARCOTIC ARR DATElatest_narcotic_arr_datenumberDate of Latest Drug Arrest .
IDOC RES CITYidoc_res_citytextSubject's City of Residence as entered on a matching Illinois Department of Corrections Record.
IDOC RES STATE CODEidoc_res_state_codetextSubject's State of Residence as entered on a matching Illinois Department of Corrections Record.
IDOC RES ZIP CODEidoc_res_zip_codetextSubject's Zip Code of Residence as entered on a matching Illinois Department of Corrections Record.
IDOC CPD DISTidoc_cpd_disttextPolice District associated with Subject's Address of Residence as entered on a matching Illinois Department of Corrections Record.
CPD ARREST Icpd_arrest_itextIs 'Y' if most recent arrest is a Chicago Police arrest and not a surrounding County arrest.
DOMESTIC ARR CNTdomestic_arr_cntnumberCount of Domestic Violence Arrests in last 10 years.
LATEST DOMESTIC ARR DATElatest_domestic_arr_datenumberDate of Latest Domestic Violence Arrest .
AGE CURRage_currtextSubject's Current Age.
SSL LAST PTV DATEssl_last_ptv_datenumberMost recent date that the subject was matched with a victim or arrest record making the subject a 'Party to Violence'
TRAP STATUStrap_statustextSeverity category using the old (Pre-2015) Targeted Repeat Offender Program.(TRAP) criteria.
RAW SSL SCOREraw_ssl_scorenumberAn intermediate version of the SSL score prior to being normalized that was a byproduct of earlier predictive models.
HEAT SCOREheat_scorenumberSame as SSL_SCORE.
RAW_HEAT_SCOREraw_heat_scorenumberSame as RAW_SSL_SCORE.
STATUS Istatus_itextIs 'Y' if SSL_SCORE is the latest version of the score for this subject.
PRE RAW HEAT SCOREpre_raw_heat_scorenumberAn integer-scaled version of the RAW_SSL_SCORE.
TRAP FLAGStrap_flagstextOne or more police units flagged as associated with the subject for purposes of the Targeted Repeat Offender program.
SSL FLAGSssl_flagstextOne or more police units flagged as associated with the subject for purposes of the Strategic Subjects List program.
LATITUDElatitudenumberLatitude of Centroid of Census Tract of Arrest for the Subject's latest arrest record.
LONGITUDElongitudenumberLongitude of Centroid of Census Tract of Arrest for the Subject's latest arrest record.
CENSUS TRACTcensus_tractnumberCensus Tract of Arrest for the Subject's latest arrest record.
COMMUNITY AREAcommunity_areatextCommunity Area of Arrest for the Subject's latest arrest record.
LOCATIONlocationlocationCentroid of Census Tract of Arrest for the Subject's latest arrest record.