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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 324 Results
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Forensic Toolmark Comparisons

Type: Research Area(s):

Published: 2023 | By: Maria Cuellar

Forensic practitioners determine whether two marks were generated by the same tool by observing the 2D images of the marks using a comparison microscope and deciding whether the ``surface contours of two toolmarks are in sufficient agreement'' based on the…

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Effect of Subclass Characteristics on Congruent Matching Cells (CMC) Algorithm

Type: Research Area(s):

Published: 2023 | By: Veronica Franklin

This presentation is a continuation of subclass characteristics present on consecutively manufactured breech face inserts. The objective is to assess manufacturing methods similar to those used by firearm manufacturers. It has been shown that subclass characteristics will be present on…

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Source Camera Identification with Multi-Camera Smartphones

Type: Research Area(s): ,

Published: 2023 | By: Stephanie Reinders

An overview of source camera identification on multi-camera smartphones, and introduction to the new CSAFE multi-camera smartphone image database, and a summary of recent results on the iPhone 14 Pro's.

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What’s in a Name? Consistency in Latent Print Examiners’ Naming Conventions and Perceptions of Minutiae Frequency

Type: Research Area(s): ,

Published: 2023 | By: Heidi Eldridge

Fingerprint minutia types influence LPEs’ decision-making processes during analysis and evaluation, with features perceived to be rarer generally given more weight. However, no large-scale studies comparing examiner perceptions of minutiae frequency to empirical counts exist. Additionally, examiner naming conventions for…

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An alternative statistical framework for measuring proficiency

Type: Research Area(s): ,

Published: 2023 | By: Amanda Luby

Item Response Theory, a class of statistical methods used prominently in educational testing, can be used to measure LPE proficiency in annual tests or research studies, while simultaneously accounting for varying difficulty among comparisons. Using black box studies in latent…

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Examiner variability in pattern evidence: proficiency, inconclusive tendency, and reporting styles

Type: Research Area(s): ,

Published: 2023 | By: Amanda Luby

The current approach to characterizing uncertainty in pattern evidence disciplines has focused on error rate studies, which provide aggregated error rates over many examiners and pieces of evidence. However, decisions are often not unanimous and error frequency is likely to…

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Statistical Interpretation and Reporting of Fingerprint Evidence: FRStat Introduction and Overview

Type: , Research Area(s): ,,

Published: 2023 | By: Jeff Salyards

The FRStat is a tool designed to help quantify the strength of fingerprint evidence. Following lengthy development and validation with assistance from CSAFE and NIST, in 2017 the FRStat was implemented at the USACIL. FRStat is now freely available and…

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A Gentle Introduction to the Likelihood Ratio: Basic Ideas, Implementation, and Limitations

Type: Research Area(s):

Published: 2023 | By: Alicia Carriquiry

The workshop focuses on the likelihood ratio (LR) approach in forensic science. The LR, a one-number summary, quantifies how well the observations/results are explained by the prosecution's versus the defense’s propositions. While the basic idea behind the LR is simple…

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Shoeprint Alignment and Comparison using Maximum Cliques

Type: Research Area(s): ,

Published: 2023 | By: Gautham Venkatasubramanian

This presentation is from the 107th International Association for Identification (IAI) Annual Educational Conference, National Harbor, Maryland, August 20-26, 2023. Posted with permission of CSAFE.

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An algorithm for source identification of footwear impressions—its application on pristine shoeprints and crime-scene like shoeprints

Type: Research Area(s): ,

Published: 2023 | By: Hana Lee

This presentation is from the 107th International Association for Identification (IAI) Annual Educational Conference, National Harbor, Maryland, August 20-26, 2023. Posted with permission of CSAFE.

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