Improving Evidence Collection Through Police-Prosecutor Coordination in Baltimore, 1984-1985

The purpose of this data collection was to investigate the effects of changes in police evidence procedures and the effects of providing feedback to officers on felony case charge reductions or dismissals due to evidentiary problems. The data were designed to permit an experimental assessment of the effectiveness of two police evidence collection programs implemented on April 1, 1985. One of these was an investigative and post-arrest procedural guide. The other was an individualized feedback report prepared by prosecutors for police officers. The officer file includes information on each officer's sex and race, length of police service, and assignment changes during the study period. Data on the offender and the case files include time of arrest, information on arresting officer, original investigating officer and principal investigating officer, offense and victim characteristics, arrestee characteristics, available evidence, case processing information, and arrestee's criminal history.

Data and Resources

Field Value
accessLevel public
bureauCode {011:21}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://www.justice.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
datagov_dedupe_retained 20210820010620
identifier 3510
issued 1990-03-02T00:00:00
language {eng}
license http://www.usa.gov/publicdomain/label/1.0/
modified 2006-01-18T00:00:00
programCode {011:060}
publisher National Institute of Justice
publisher_hierarchy Office of Justice Programs > National Institute of Justice
resource-type Dataset
source_datajson_identifier true
source_hash cb49ccf0fcf1eb8a0e28755d9206c054024456be
source_schema_version 1.1
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • arrest-procedures
  • ckan
  • evidence
  • felony-offenses
  • geo
  • geoss
  • national
  • north-america
  • police
  • prosecution
  • united-states
isopen False
license_id us-pd
license_title us-pd
maintainer Open Data Office of Justice Programs (USDOJ)
maintainer_email opendata@usdoj.gov
metadata_created 2025-11-21T01:41:32.309406
metadata_modified 2025-11-21T01:41:32.309409
notes The purpose of this data collection was to investigate the effects of changes in police evidence procedures and the effects of providing feedback to officers on felony case charge reductions or dismissals due to evidentiary problems. The data were designed to permit an experimental assessment of the effectiveness of two police evidence collection programs implemented on April 1, 1985. One of these was an investigative and post-arrest procedural guide. The other was an individualized feedback report prepared by prosecutors for police officers. The officer file includes information on each officer's sex and race, length of police service, and assignment changes during the study period. Data on the offender and the case files include time of arrest, information on arresting officer, original investigating officer and principal investigating officer, offense and victim characteristics, arrestee characteristics, available evidence, case processing information, and arrestee's criminal history.
num_resources 1
num_tags 13
title Improving Evidence Collection Through Police-Prosecutor Coordination in Baltimore, 1984-1985