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Effects of Defense Counsel on Homicide Case Outcomes in Philadelphia, Pennsylvania, 1995-2004 [United States] (ICPSR 32541)

Released/updated on: 2012-09-21
Geographic coverage: United States, Philadelphia, Pennsylvania
Time period: 1994-01-01--2005-12-31
This study measured the difference that defense counsel made to the outcome of homicide and death penalty cases. One in five indigent murder defendants in Philadelphia were randomly assigned representation by the Defender Association of Philadelphia while the remainder received court-appointed private attorneys. This study's research design utilized this random assignment to measure how defense counsel affected murder case outcomes. The research team collected data on 3,157 defendants charged with murder in Philadelphia Municipal Court between 1995-2004, using records provided by the Philadelphia Courts (First Judicial District of Pennsylvania). Data were also obtained from the Philadelphia Court of Common Pleas, the Pennsylvania Unified Judicial System web portal, the National Corrections Reporting Program, and the 2000 Census. This study contains a total of 47 variables including public defender representation, defendant demographics, ZIP code characteristics, prior criminal history, case characteristics, case outcomes, and case handling procedures.
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Impact Evaluation of the National Crime Victim Law Institute's Victims' Rights Clinics, 2009-2010 [United States] (ICPSR 34487)

Released/updated on: 2016-04-29
Geographic coverage: United States, Colorado, Maryland, Utah, South Carolina
Time period: 2009-01-01--2010-12-31

These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.

The purpose of the impact evaluation was to gauge the success of the victim's rights clinics in attaining each of the following goals

  • Aid in enforcing rights for individual victims and getting them help for crime-related needs, thereby increasing satisfaction of victims with the justice process;
  • Change attitudes of criminal justice officials towards victims' rights and increase their knowledge about rights;
  • Change the legal landscape: establish victim standing and develop positive case law;
  • Increase compliance of criminal justice officials with victims' rights; and
  • Sustain the clinic through developing alternative sources of funding

Researchers conducted surveys with prosecutors, judges, victim advocates, and defense attorneys to determine whether they had changed their attitudes toward victims' rights since the local clinic opened its doors. Surveys were fielded in South Carolina, Maryland, and Utah (Criminal Justice Official data, n=552) where clinic evaluations were conducted. An additional survey was fielded in Colorado (Colorado data, n=583) where the victim rights clinic had not yet started to accept cases. To determine the effect that clinics had on observance of victims' rights, researchers collected three samples of cases from prosecutors (NCVLI Case File Data, n=757) in the jurisdiction or jurisdictions in which each local clinic had done the most work: (a) all clinic cases closed since the start of each local clinic; (b) cases closed during the most recent 12-month period which did not involve representation by a clinic attorney; and (c) cases closed in the year prior to the start of each local clinic. Finally, to assess the impact of the clinics on victims' satisfaction with the criminal justice process and its compliance with their rights, researchers conducted telephone interviews (Victim Survey Data, n=125) with two samples of victims in each evaluation site, one drawn from the sample of cases at prosecutor offices and one drawn from the crime victim legal clinics.

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Improving the Production and Use of Forensic Science, 5 U.S. counties, 2006-2009 (ICPSR 36727)

Released/updated on: 2022-03-16
Geographic coverage: Allegheny County, Bexar County, United States, Sedgwick County, Texas, Sacramento County, California, Kansas, King County, Washington, Pennsylvania
Time period: 2006-01-01--2009-12-31

This study collection sought to thoroughly understand the creation, testing, and use of forensic science in five jurisdictions across the country. A random sample was selected of recent criminal cases in the following jurisdictions and tracked from investigation to adjudication to understand how forensic evidence functions:

  • Sacramento County, CA: 990 cases
  • Segwick County, KS: 936 cases
  • Allegheny County, PA: 978 cases
  • Bexar County (San Antonio), TX: 936 cases
  • King County, WA: 892 cases

The Principal Investigator sought answers to the following seven primary research questions:

  • How often is forensic evidence collected and analyzed and how is it used pre-arrest?
  • What are the outcomes of forensic evidence testing?
  • What is the effect of forensic evidence on arrest and charging?
  • How does forensic evidence affect the plea-bargaining process?
  • What effect does forensic evidence have on conviction and sentencing outcomes?
  • Does the turnaround time for analysis of forensic evidence have any impact on case disposition?
  • Does the institutional configuration of the crime laboratory have any effect on its productivity?

Data for the following types of forensic testing are included in this data collection: hair, fibers, glass, paint, gas chromatography / mass spectrometry (GC/MS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy / energy dispersive x-ray spectroscopy (SEM/EDX), physical match, drug identification, toxicology, serology, combined DNA index system (CODIS), DNA short tandem repeat (Y-STR), blood pattern, test fire, and comparison scope.

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Understanding the Use and Efficacy of Moderate Stringency DNA Searches, United States, 2018 (ICPSR 37691)

Released/updated on: 2023-05-17
Geographic coverage: United States
Time period: 2018-01-01--2018-12-31
This study was undertaken to investigate familial DNA and moderate stringency DNA testing practices and to highlight the policy development, associated costs, limitations, and capabilities that DNA testing provides in order to offer relevant insight to criminal justice and law enforcement policymakers and researchers who are interested in the use of DNA testing to solve and deter crime.
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