Latent Print

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

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

An alternative statistical framework for measuring proficiency

November 28, 2023 / Presentation Slides / Forensic Statistics, Latent Print

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

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

November 28, 2023 / Presentation Slides / Forensic Statistics, Latent Print

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

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

November 28, 2023 / Presentation Slides, Short Courses / Forensic Statistics, Latent Print, Training and Education

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

A method for quantifying individual decision thresholds of latent print examiners

November 17, 2023 / Publication / Forensic Statistics, Latent Print

In recent years, ‘black box’ studies in forensic science have emerged as the preferred way to provide information about the overall validity of forensic disciplines in practice. These studies provide

How Minutiae Frequency is Perceived and Used by Fingerprint Analysts in the Evaluation of Fingerprint Evidence

July 17, 2023 / Presentation Slides / Latent Print

Analysts consider the appearance, placement, and number of features within a fingerprint pattern (called minutiae) that correspond when deciding whether two fingerprints originated from the same person. Little is known

Analyzing spatial responses: A comparison of IRT- based approaches

July 12, 2023 / Publication / Forensic Statistics, Latent Print

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

Perceptions of blind proficiency testing among latent print examiners

June 29, 2023 / Publication / Implementation and Practice, Latent Print

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

What types of information can and do latent print examiners review? A survey of practicing examiners

June 29, 2023 / Publication / Implementation and Practice, Latent Print

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

Does image editing improve the quality of latent prints? An analysis of image-editing techniques in one crime laboratory

January 9, 2023 / Publication / Latent Print

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

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