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Search Results

Showing 1 - 8 of 8 results.

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    Study Title/Investigator
    Released/Updated
    1.
    Census of Publicly Funded Forensic Crime Laboratories, 2014 (ICPSR 36759)
    United States Department of Justice. Office of Justice Programs. Bureau of Justice Statistics
    This data collection contains data from censuses of publicly funded crime laboratories in 2014. The data were collected to examine change and stability in the operations of crime laboratories serving federal, state, and local jurisdictions. The Bureau of Justice Statistics (BJS) first surveyed forensic crime laboratories in 1998, focusing solely on agencies that performed DNA analysis. The National Institute of Justice (NIJ) funded the 1998 study as part of its DNA Laboratory Improvement Program. The BJS' National Study of DNA Laboratories was repeated in 2001. An expanded version of the data collection, called the Census of Publicly Funded Forensic Crime Laboratories, was first conducted among all forensic crime laboratories in 2002. For the 2014 study, data were collected from April 2015 to September 2015 on the organization, functions, budget, staffing, workload, and performance expectations of the nation's forensic crime laboratories operating in 2014. A total of 360 of the 409 eligible crime laboratories operating in 2014 responded to the census. The nation's publicly funded forensic crime laboratories performed a variety of forensic services in 2014, including DNA testing and controlled substance identification for federal, state, and local jurisdictions. The 2014 Census of Publicly Funded Forensic Crime Laboratories obtained detailed information on the types of forensic requests received by these laboratories and the resources needed to complete them. The census also collected data on crime laboratory budgets, personnel, accreditations, and backlogged cases.
    2017-04-19
    2.
    Census of Publicly Funded Forensic Crime Laboratories, 2020 (ICPSR 38901)
    United States Department of Justice. Office of Justice Programs. Bureau of Justice Statistics
    This data collection contains data from the 2020 Census of Publicly Funded Forensic Crime Laboratories (CPFFCL). The CPFFCL collected data on organizational characteristics, functions, budget, staffing, workload, resources, and quality assurance practices of publicly funded forensic crime laboratories operating in the U.S. and serving federal, state, and local jurisdictions. The CPFFCL includes crime labs that employed one or more full-time scientists who possess a minimum of a bachelor's degree in chemistry, physics, biology, criminalistics, forensic science or a closely related field and whose principal functions are examining physical evidence in criminal matters and providing reports and testimony to courts of law with respect to such evidence. Private laboratories were excluded from the CPFFCL. Laboratories may operate independently or as part of a larger system. Respondents to the CPFFCL could choose to respond as individual labs or as one system. A total of 423 individual labs, constituting 326 standalone labs and multilab systems, received the questionnaire. A total of 382 (90%) individual labs responded to the 2020 CPFFCL and 293 (90%) standalone labs and multilab systems responded. For the 2020 study, data were collected from July 2021 to February 2022. The Bureau of Justice Statistics (BJS) first surveyed forensic crime laboratories in 1998, focusing solely on agencies that performed DNA analysis. The National Institute of Justice (NIJ) funded the 1998 study as part of its DNA Laboratory Improvement Program. The BJS' National Study of DNA Laboratories was repeated in 2001. An expanded version of the data collection, called the Census of Publicly Funded Forensic Crime Laboratories, was first conducted among all forensic crime laboratories in 2002.
    2024-01-29
    3.
    Development of Next-Generation Fingermark Lifters and On-the-Spot Visualization Devices, Australia and United States, 2017-2021 (ICPSR 38316)
    Hofstetter, Oliver
    Fingermark identification remains one of the most important and unambiguous approaches to place perpetrators at crime scenes. While a great number of forensic techniques for the visualization of latent marks already exist, they all suffer from one or more shortcomings such as: limited applicability with regard to the age of a mark or the nature of the surface it was deposited on ("substrate"); the requirement of expensive laboratory equipment and special training; and the potential to alter or even destroy evidence, or at least leave a visible record of their application. The goal of this project was to develop and validate novel fingermark lifters, which allow instantaneous, on-the-spot visualization of marks. The underlying detection principle used with these lifters is based on the reaction of either pH-sensitive or amine-reactive substances - immobilized on suitable solid supports such as membranes - with chemicals contained in fingermark residues (e.g., lactic acid, amino acids, proteins, and amino sugars). The exposure of appropriate reagents to such an environment causes a change in their spectroscopic properties, which can be seen, depending on the type of reagent, either under ambient or luminescent light conditions.
    2023-02-13
    4.
    Forensic Evidence in Homicide Investigations, Cleveland, Ohio, 2008-2011 (ICPSR 36202)
    McEwen, J. Thomas; Regoeczi, Wendy C.
    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 objective of this study was to determine how homicide investigators use evidence during the course of their investigations. Data on 294 homicide cases (315 victims) that occurred in Cleveland between 2008 and 2011 was collected from investigative reports, forensic analysis reports, prosecutors and homicide investigators, provided by the Cleveland Ohio Police Department, Cuyahoga County Medical Examiner's Office, and Cuyahoga County Clerk of Courts. The study collection includes 1 Stata data file (NIJ_Cleveland_Homicides.dta, n=294, 109 variables).
    2018-02-13
    5.
    Identification of Minor Dye Components of Fibers via Integrating Cavity-Enhanced Raman Spectroscopy, 2019-2022 (ICPSR 38884)
    Eilers, Hergen
    The goal of this project is to evaluate integrating-cavity-enhanced Raman spectroscopy (ICERS) to measure anti-Stokes Raman spectra for the characterization of dyed fibers. ICERS has been developed for the ultrasensitive identification and characterization of materials, and enhancements of five orders of magnitude have been demonstrated. Using ICERS to measure anti-Stokes Raman spectra eliminates the fluorescence background, while the cavity design amplifies the anti-Stokes Raman signal. The combination of the two makes it possible to detect, identify, and characterize minor dye components without interference from fluorescence. Such an approach is expected to reveal more minor dye components which could help narrow down the source of the fiber in question.
    2023-09-05
    6.
    Pilot Study of State and Federal Digital Evidence Laboratories, [United States], 2014 (ICPSR 37055)
    United States Department of Justice. Office of Justice Programs. Bureau of Justice Statistics
    The Pilot Study of State and Federal Digital Evidence Laboratories data collection contains data collected in 2015 as part of the Census of Publicly Funded Forensic Crime Laboratories (CPFFCL). The CPFFCL examined the forensic services provided by publicly funded crime labs across the nation and the resources devoted to completing the work. To capture more information about an emerging forensic science discipline known as digital evidence, the Bureau of Justice Statistics (BJS) expanded the scope of the 2014 CPFFCL from previous data collections to include a separate pilot study of state and federal agencies that solely analyzed digital evidence in support of criminal investigations and prosecutions. These agencies obtained digital and multimedia evidence in various formats, including audio, video, and graphical images from computers, cell phones, cameras, and other electronic devices. The traditional CPFFCL definition of a crime lab limited the information collected about digital evidence since some agencies only handle this type of evidence and employ forensic experts with training in computer science or information technology as opposed to natural sciences such as chemistry and biology. The census collected detailed information on laboratory staff, budgets, workloads, and backlogs in requests for forensic services. The census also provides data on lab accreditations, proficiency tests, and other quality assurances.
    2018-10-18
    7.
    Testing a ''Not Sure'' Instruction as a Prophylactic Against the Harmful Impact of System and Estimator Variables on Lineup Identification Accuracy, United States and United Kingdom, 2019-2023 (ICPSR 38947)
    Charman, Steve D.
    Eyewitness lineup identification accuracy is affected by numerous variables, including those that are under the control of the legal system, called system variables (e.g., pre-lineup instructions), and those that are not under the control of the legal system, called estimator variables (e.g., the race of the perpetrator). One of the ultimate goals of eyewitness researchers is to develop procedures that: minimize false identifications caused by system and estimator variables (while minimizing any decrease in correct identifications), and require few resources for law enforcement to enact. The project tested the effectiveness of a system variable--providing witnesses with an explicit 'not sure' instruction before viewing the lineup-- that potentially meets both of these criteria. Furthermore, a 'not sure' instruction may act as a prophylactic against the harmful effects of system and estimator variables known to inflate false identifications. The specific objective of the research was to test the effectiveness of this 'not sure' instruction.
    2024-07-15
    8.
    Understanding Familial DNA: National Study of Policies, Procedures, and Potential Impact, 2014 (ICPSR 36810)
    Debus-Sherrill, Sara
    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. Seeking to measure the usage of Familial DNA Searching (FDS) to aid in criminal investigations, this study utilized a multi-phase, mixed methods approach to obtain data on FDS policies and practices in the United States. This study includes data from the National Survey of CODIS Laboratories, which was compiled after two expert roundtables, a literature and policy scan of practice, cost modeling, and state case studies. The study includes one SPSS data file: FDS_National_Survey_of_CODIS_Labs_Data.sav
    2018-03-01
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