CSAFE’s Latest Resources
Change cannot happen without community. CSAFE is passionate about achieving its mission to apply a statistically sound and scientifically solid foundation to the interpretation of forensic evidence. To that end, we invite fellow scientists and researchers, along with those in the forensic and legal communities, to use and share these resources as we work together to elevate forensic science and technology.
Knowledge Transfer
Found 324 Results
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Analyzing spatial responses: A comparison of IRT- based approaches
Type: Publication Research Area(s): Forensic Statistics,Latent Print
Published: 2023 | By: Amanda Luby
We investigate two approaches for analyzing spatial coordinate responses using models inspired by Item Response Theory (IRT). In the first, we use a two-stage approach to first construct a pseudoresponse matrix using the spatial information and then apply standard IRT…
The Future of Pattern Recognition in Forensic Science
Type: Presentation Slides Research Area(s): Forensic Statistics,Implementation and Practice
Published: 2023 | By: Alicia Carriquiry
This presentation is from World Police Summit 2023, Dubai, United Arab Emirates, March 7-9, 2023. Posted with permission of CSAFE.
An Overview of the Two-Stage, Score-Based Likelihood Ratio, and Bayes Factor Approaches for Writership Determinations
Type: Presentation Slides Research Area(s): Forensic Statistics,Handwriting
Published: 2023 | By: Danica Ommen
A variety of statistical approaches have been developed at the Center for Statistics and Applications in Forensic Evidence (CSAFE) to address the question of writership for forensic document examinations. Previous work at CSAFE has addressed the closed-set problem, when the…
Judging Firearms Evidence
Type: Publication Research Area(s): Firearms and Toolmarks,Implementation and Practice
Published: 2023 | By: Brandon L. Garrett
Firearms violence results in hundreds of thousands of criminal investigations each year. To try to identify a culprit, firearms examiners seek to link fired shell casings or bullets from crime scene evidence to a particular firearm. The underlying assumption is…
A Rotation-Based Feature and Bayesian Hierarchical Model for the Forensic Evaluation of Handwriting Evidence in a Closed Set
Type: Publication Research Area(s): Forensic Statistics,Handwriting
Published: 2023 | By: Amy Crawford
Forensic handwriting examiners are often tasked with identifying the writer of a particular document. Examples of handwriting evidence include ransom notes, forged documents and signatures, and threatening letters. At present, examiners rely on visual inspection of similarities and differences between…
Shining a Light on Forensic Black-box Studies
Type: Publication Research Area(s): Forensic Statistics,Implementation and Practice
Published: 2023 | By: Kori Khan
Forensic science plays a critical role in the United States criminal justice system. For decades, many feature-based fields of forensic science, such as firearm and toolmark identification, developed outside the scientific community's purview. The results of these studies are widely…
Creating a Forensic Database of Shoeprints from Online Shoe-Tread Photos
Type: Publication Research Area(s): Footwear
Published: 2023 | By: Samia Shafique
Shoe-tread impressions are one of the most common types of evidence left at crime scenes. However, the utility of such evidence is limited by the lack of databases of footwear prints that cover the large and growing number of distinct…
Perceptions of blind proficiency testing among latent print examiners
Type: Publication Research Area(s): Implementation and Practice,Latent Print
Published: 2023 | By: Brett O. Gardner
In recent years, scholars have levied multiple criticisms against traditional proficiency testing procedures in forensic laboratories. Consequently, on several occasions, authorities have formally recommended that laboratories implement blind proficiency testing procedures. Implementation has been slow, but laboratory management has increasingly…
What types of information can and do latent print examiners review? A survey of practicing examiners
Type: Publication Research Area(s): Implementation and Practice,Latent Print
Published: 2023 | By: Brett Gardner
Understanding typical work practices is important to understanding the decision-making process underlying latent print comparison and improving the reliability of the discipline. Despite efforts to standardize work practices, a growing literature has demonstrated that contextual effects can influence every aspect…
Hierarchical Bayesian non-response models for error rates in forensic black-box studies
Type: Publication Research Area(s): Forensic Statistics,Implementation and Practice,Training and Education
Published: 2023 | By: Kori Khan
Forensic science plays a critical role in the United States criminal legal system. Historically, however, most feature-based fields of forensic science, including firearms examination and latent print analysis, have not been shown to be scientifically valid. Recently, black-box studies have…
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