Firearms and Toolmarks

Advancing the Understanding of 3D Imaging for Firearms Identification

November 25, 2024 / Presentation Slides / Firearms and Toolmarks

Houston Forensic Science Center, in collaboration with CSAFE, has been awarded an NIJ grant to conduct a study focused on comparability of images acquired by 3D instruments manufactured by different

Algorithmic matching of striated tool marks

Automatic matching algorithms for assessing the similarity between striation marks have been investigated for bullet lands and some tool marks, such as screwdrivers. We are interested in the investigation of

A reproducible pipeline for extracting representative signals from wire cuts

November 18, 2024 / Conference Proceeding / Firearms and Toolmarks, Forensic Statistics

We propose a reproducible pipeline for extracting representative signals from 2D topographic scans of the tips of cut wires. The process fully addresses many potential problems in the quality of

An algorithm for forensic toolmark comparisons

November 18, 2024 / Publication / Firearms and Toolmarks, Forensic Statistics

Forensic toolmark analysis traditionally relies on subjective human judgment, leading to inconsistencies and lack of transparency. The multitude of variables, including angles and directions of mark generation, further complicates comparisons.

A preliminary study of the manufacturing of breech faces

November 18, 2024 / Publication / Firearms and Toolmarks, Forensic Statistics

Firearm examiners may face challenges with subclass characteristics. Subclass characteristics have the potential to be confused with individual characteristics if a careful analysis for the presence of subclass characteristics is

Is it a True Match? Top k correlations in a database search

July 8, 2024 / Presentation Slides / Firearms and Toolmarks, Forensic Statistics

This presentation is from the 76th Annual Conference of the American Academy of Forensic Sciences (AAFS), Denver, Colorado, February 19-24, 2024.

Forensic Toolmark Comparisons

November 29, 2023 / Presentation Slides / Firearms and Toolmarks

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

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

November 29, 2023 / Presentation Slides / Firearms and Toolmarks

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

Diagnostic Tools for Automatic Cartridge Case Comparisons

November 27, 2023 / Presentation Slides / Firearms and Toolmarks, Forensic Statistics

A Study in Reproducibility: The Congruent Matching Cells Algorithm and cmcR Package

July 17, 2023 / Publication / Firearms and Toolmarks

Scientific research is driven by our ability to use methods, procedures, and materials from previous studies and further research by adding to it. As the need for computationally-intensive methods to

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