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Presentation Slides

Comparing handwriter and FLASH ID®, Two Handwriting Analysis Programs

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,
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Evaluating Reference Sets for Score-Based Likelihood Ratios for Camera Device Identification

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
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Error Rate Methods for Forensic Handwriting Identification

Presentation is from the 106th International Association for Identification (IAI) Annual Educational Conference
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Analyzing spatial responses: A comparison of IRT- based approaches, Conference Presentation

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
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Characterizing Variability in Forensic Decision-Making with Item Response Theory

This presentation is from the 2022 Joint Statistical Meetings
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Measuring Proficiency among Latent Print Examiners: A Statistical Approach from Standardized Testing

This presentation is from the 74th Annual Scientific Conference of the American Academy of Forensic Sciences
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A New Algorithm for Source Identification of Look-alike Footwear Impressions Based on Automatic Alignment

Presentation at the International Association for Identification
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Affect of Manufacturer Finishing Methods on Subclass Characteristics Production on Breech Faces

The following is a presentation given at Association for Firearms and Toolmarks (AFTE) (2022).
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An Algorithm for Forensic Toolmark Comparisons

Forensic handheld toolmark examiners currently compare toolmarks (e.g. scratch marks on wire found as part of an explosive device, or on a door frame after someone broke into a house)
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Revisiting the Likelihood Ratio: A Gentle Introduction and Some Examples

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