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Firearms and Toolmarks

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

January 5, 2023 / / ,
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)
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A Pipeline for Cartridge Case Comparisons

November 30, 2022 / /
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
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Affect of Manufacturer Finishing Methods on Subclass Characteristics Production on Breech Faces

November 29, 2022 / /
The following is a presentation given at Association for Firearms and Toolmarks (AFTE) (2022).
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An Algorithm for Forensic Toolmark Comparisons

November 29, 2022 / /
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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Exploration of Subclass Characteristics Manufacturing

September 21, 2022 / /
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
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Surveying Practicing Firearm Examiners

June 13, 2022 / / ,
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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Blind testing in firearms: Preliminary results from a blind quality control program

June 13, 2022 / / ,
Open proficiency tests meet accreditation requirements and measure examiner competence but may not represent actual casework. In December 2015, the Houston Forensic Science Center began a blind quality control program
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Ruger LCP Study: a two-pronged approach

March 18, 2022 / /
This study started as an attempt to take a closer look at the rifling observed in the 380 Auto Ruger LCP pistol
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Treatment of inconclusives in the AFTE range of conclusions

October 20, 2021 / /
In the past decade, and in response to the recommendations set forth by the National Research Council Committee on Identifying the Needs of the Forensic Sciences Community (2009), scientists have
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Using Machine Learning Methods to Predict Similarity of Striations on Bullet Lands

October 12, 2021 / /
Recent advances in microscopy have made it possible to collect 3D topographic data, enabling virtual comparisons based on the collected 3D data next to traditional comparison microscopy. Automatic matching algorithms
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