Forensic Toolmark Comparisons
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
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
The following was presented at the Association of Firearm and Tool Mark Examiners (AFTE) 2023, Austin, Texas, May 21-26, 2023. Copyright 2023, The Authors. Posted with permission of CSAFE.
A Study in Reproducibility: The Congruent Matching Cells Algorithm and cmcR Package
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
This presentation highlighted CSAFE’s collaboration with the ASCLD FRC Collaboration Hub.
Judging Firearms Evidence
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
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
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
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
The following is a presentation given at Association for Firearms and Toolmarks (AFTE) (2022).