DOI: 10.3886/icpsr38998
title: Evaluation of Digital Evidence Processing Efficiencies in Publicly Funded Crime Laboratories, United States, 2020-2023
title: Archival Version

description: This study investigated the use and value of digital evidence (DE) to create an evidence base for more efficient and effective DE management and processing. Researchers aimed to assess existing laboratory protocols and better understand the scientific rationale underpinning existing laboratory processes with the ultimate goal of assisting law enforcement agencies and crime laboratories in eliminating backlogs, optimizing available resources, and decreasing justice delays. The data deposited with ICPSR include the Crime Laboratories Survey Data, which describe the processes used by crime laboratories to manage and analyze DE, and the Law Enforcement Agencies Survey Data, which includes information on methods and processes for DE seizure, management, and analysis, and data about coordination between law enforcement agencies and associated crime laboratories.
description: Researchers aimed to assist law enforcement agencies and crime laboratories in improving digital evidence processing and management by answering the following research questions:

What protocols, practices, and technologies do crime laboratories and LE agencies have regarding the processing of DE?
Which established practices result in the highest percentages of successful outcomes?
What are the most prevalent and impactful gaps affecting case outcomes?
description: This study proceeded in two phases, one quantitative and one qualitative. The quantitative data included in this release includes two datasets: Crime Laboratories Survey Data and Law Enforcement Agencies Survey Data. Both quantitative datasets were collected using online surveys distributed via emailed link to individuals representing a crime laboratory or law enforcement agency. Each survey took around 15-20 minutes to complete and was open for a period of approximately 4 months, with the Crime Laboratories Survey open late February through late June 2022, and the Law Enforcement Agencies Survey open from late October 2022 through early March 2023. Researchers conducted outreach to potential respondents throughout each period, and the Law Enforcement Agencies Survey was condensed into a shorter, 10-minute long "critical items survey" which launched in January 2023 to increase response rates. 
In the qualitative phase, three law enforcement agencies were paired with three crime laboratories for semi-structured qualitative interviews aimed at understanding the relationship between the two organizations. Interviews were conducted via Zoom from May to August 2023, and were later transcribed and coded for analysis. The qualitative data collected through these interviews was not included in this ICPSR release, but will be made available at a later date. Please refer to the ICPSR README file for additional information.
description: The Crime Laboratories Survey Data include demographic variables about the jurisdiction served by each laboratory as well as information about laboratory budget, types of analysis preformed, quantity of tests performed, and the policies and methods used to analyze and manage digital evidence. The Law Enforcement Agencies Survey Data include similar demographic variables as well as variables describing agency budget, whether digital evidence training was provided to officers, the number of cases involving digital evidence, relationships with crime laboratories, types of digital evidence analyzed, turnaround times for evidence analysis, and the policies and systems used to seize, analyze, and manage digital evidence.
description: Response Rates: Crime Laboratories Survey: A total of 32 crime laboratories completed the full survey while 3 crime laboratories partially completed the survey for a 40% response rate.
Law Enforcement Agency Survey: A total of 16 LE agencies completed the full survey while 8 law enforcement agencies completed the critical items survey for a 34% response rate.
description: The Crime Laboratories Survey Data were collected using a sample of crime laboratories informed by data from the 2014 Bureau of Justice Statistics' Census for Publicly Funded Forensic Crime Laboratories. This sample was further limited to include only local and state-based laboratories with a specific department dedicated to computer/cybercrime, resulting in a final sample frame of 80 laboratories. 
The Law Enforcement Agencies Survey Data was collected using a sample frame of 71 law enforcement agencies identified by crime laboratories in the Crime Laboratories Survey.
description: Datasets: 
DS0: Study-Level Files
DS1: Crime Laboratories Survey Data
DS2: Law Enforcement Agencies Survey Data
description: Law enforcement agencies and crime laboratories in the United States.
description: web-based surveyThis study includes 12 qualitative data files containing interview transcripts which were not included in this data release. Please refer to the ICPSR README file for additional information.