2026 April Data Releases
By ICPSR Staff
This April, the National Archive of Criminal Justice Data (NACJD) at the Inter-university Consortium for Political and Social Research (ICPSR) released 13 new studies, including new data from the National Prison Statistics (NPS) series. Other newly released data cover topics such as: forensic science, correctional systems, student behavior, and more. Please click on the study titles linked below for more information about a particular study.
BJS Releases
- Survey of Campus Law Enforcement Agencies, 2021-2022: [United States] (ICPSR 39452) (update)
- National Prisoner Statistics, [United States], 1978-2023 (ICPSR 39657)
NIJ Releases
- Improving Results from Touch DNA Evidence with Optimized Direct Polymerase Chain Reaction Methods, 2020-2022 (ICPSR 39811)
- Experimental and Numerical Investigations for the Development and Validation of Thermo-Chemistry Models and Property Databases for Selected Wall Lining Materials Under Fire Exposure, United States, 2024-2025 (ICPSR 39812)
- Comparative Evaluation of Low- and High-Resolution Mass Spectrometric Approaches for Screening and Confirmation of New Psychoactive Substances in Human Specimen Matrices, 2022-2025 (ICPSR 39823)
- Comprehensive School Safety in Atlanta Public Schools, Georgia, 2015-2021 (ICPSR 38459)
- Advancing the Understanding of Immigration, Crime, and Crime Reporting at the Local Level with a Synthetic Population, United States, 2019 (ICPSR 39318)
- Evaluation of Reentry-Based Restorative Justice: A Randomized Controlled Trial, Detroit, Michigan, 2019-2024 (ICPSR 39600)
- Fast Screening of Firearm Discharge Residues by Laser-based Spectrochemical Methods, Electrochemical Sensors, and Chemometrics, West Virginia, 2019-2021 (ICPSR 38296)
- Evaluation of the Southeastern Pennsylvania Transportation Authority (SEPTA) Transit Police Serving a Vulnerable Entity (SAVE) Initiative, 2022-2023 (ICPSR 39658)
- Disrupting Human Trafficking Networks Through Mathematical Modeling: Addressing Replacement Effects and Uncertain Information, 2020 (ICPSR 39827)
- Evaluation of a Principal Training Program to Promote Safe and Civil Schools, Oklahoma, 2017-2022 (ICPSR 39076)
OJJDP Releases