Firearms and Toolmarks

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

CSAFE Project Update & ASCLD FRC Collaboration

July 14, 2023 / Presentation Slides / Digital, Firearms and Toolmarks, Footwear, Forensic Statistics, Handwriting, Implementation and Practice

This presentation highlighted CSAFE’s collaboration with the ASCLD FRC Collaboration Hub.

Judging Firearms Evidence

July 12, 2023 / Publication / Firearms and Toolmarks, Implementation and Practice

Firearms violence results in hundreds of thousands of criminal investigations each year. To try to identify a culprit, firearms examiners seek to link fired shell casings or bullets from crime

Blind Testing and Blind Verification in Firearms

June 29, 2023 / Presentation Slides / Blind Testing, Firearms and Toolmarks

This workshop provides a summary of the Houston Forensic Science Center’s blind quality control program, focusing on blind quality control and blind verification in the Firearms section. The presenters will

An Open-Source Implementation of the CMPS Algorithm for Assessing Similarity of Bullets

January 5, 2023 / Publication / Firearms and Toolmarks, Forensic Statistics

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)

A Pipeline for Cartridge Case Comparisons

November 30, 2022 / Poster / Firearms and Toolmarks

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

Affect of Manufacturer Finishing Methods on Subclass Characteristics Production on Breech Faces

November 29, 2022 / Presentation Slides / Firearms and Toolmarks

The following is a presentation given at Association for Firearms and Toolmarks (AFTE) (2022).

An Algorithm for Forensic Toolmark Comparisons

November 29, 2022 / Presentation Slides / Firearms and Toolmarks

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)

Exploration of Subclass Characteristics Manufacturing

September 21, 2022 / Presentation Slides / Firearms and Toolmarks

A webinar presented during the Forensic Technology Center of Excellence (FTCoE0 Firearm and Toolmark webinar series on the progress of our CSAFE project. This study assesses the production of subclass

Surveying Practicing Firearm Examiners

June 13, 2022 / Publication / Firearms and Toolmarks, Implementation and Practice

A sample (n = 79) of practicing firearm and toolmark examiners was queried about casework as well as their views about the potential role that statistics might play in future

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