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.
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Found 272 Results
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Towards a likelihood ratio approach for bloodstain pattern analysis
Type: Publication Research Area(s): Bloodstain,Forensic Statistics
Published: 2022 | By: Tong Zou
In this work, we explore the application of likelihood ratio as a forensic evidence assessment tool to evaluate the causal mechanism of a bloodstain pattern. It is assumed that there are two competing hypotheses regarding the cause of a bloodstain…
Does image editing improve the quality of latent prints? An analysis of image-editing techniques in one crime laboratory
Type: Publication Research Area(s): Latent Print
Published: 2023 | By: Brett Gardner
Field research within latent print comparison has remained sparse in the context of an otherwise growing body of literature examining the discipline. Studies examining how ACE-V procedures are implemented within active crime laboratories are especially lacking in light of research…
An Open-Source Implementation of the CMPS Algorithm for Assessing Similarity of Bullets
Type: Publication Research Area(s): Firearms and Toolmarks,Forensic Statistics
Published: 2022 | By: Wangqian Ju
In this paper, we introduce the R package cmpsR, an open-source implementation of the Congruent Matching Profile Segments (CMPS) method developed at the National Institute of Standards and Technology (NIST) for objective comparison of striated tool marks. The functionality of…
A Data-Driven Approach to Model the Generation Process of Bloodstain Patterns
Type: Poster Research Area(s): Bloodstain
Published: 2022 | By: Tong Zou
This poster was presented at the 106th International Association for Identification
A Pipeline for Cartridge Case Comparisons
Type: Poster Research Area(s): Firearms and Toolmarks
Published: 2022 | By: Joseph Zemmels
We introduce novel sub-procedures in the pre-processing, comparison and similarity feature steps. The sub-procedures result in an improved error rate compared to our implementation of the CMC method while also requiring fewer parameters. The fitted Decision tree model is easily…
Reply to Response to Vacuous standards – Subversion of the OSAC standards-development process
Type: Publication Research Area(s): Implementation and Practice
Published: 2021 | By: Geoffrey Stewart Morrison
This Letter to the Editor is a reply to Mohammed et al. (2021) https://doi.org/10.1016/j.fsisyn.2021.100145, which in turn is a response to Morrison et al. (2020) “Vacuous standards – subversion of the OSAC standards-development process” https://doi.org/10.1016/j.fsisyn.2020.06.005.
LibDroid: Summarizing information flow of Android Native Libraries via Static Analysis
Type: Publication Research Area(s): Digital
Published: 2022 | By: Chen Shi
With advancements in technology, people are taking advantage of mobile devices to access e-mails, search the web, and video chat. Therefore, extracting evidence from mobile phones is an important component of the investigation process. As Android app developers could leverage…
Jury Perception of Bullet Matching Algorithms and Demonstrative Evidence
Type: Poster Research Area(s): Implementation and Practice
Published: 2022 | By: Rachel Rogers
Presented at Joint Statistical Meetings
Comparing handwriter and FLASH ID®, Two Handwriting Analysis Programs
Type: Presentation Slides Research Area(s): Handwriting
Published: 2022 | By: Stephanie Reinders
FLASH ID and handwriter are computer programs that compare questioned handwritten documents against handwritten samples from known writers. FLASH ID was developed by Sciometrics and is used by the FBI, Handwriter is an open-source R package designed by CSAFE. We…
Evaluating Reference Sets for Score-Based Likelihood Ratios for Camera Device Identification
Type: Presentation Slides Research Area(s): Digital
Published: 2022 | By: Stephanie Reinders
An investigator wants to know if an illicit image captured by an unknown camera was taken by a person of interest’s (POI’s) phone. Score-based likelihood ratios (SLRs) have been used to answer this question in previous research. We explore whether…
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