Forensic Data Science |
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Firearms |
Selected Publications
- Basu N., Bolton-King R.S., Morrison G.S. (2022). Forensic comparison of fired cartridge cases: Feature-extraction methods for feature-based calculation of likelihood ratios. Forensic Science International: Synergy, 5, 100272.
https://doi.org/10.1016/j.fsisyn.2022.100272
Software– E3 Fired Cartridge Case Comparison System (version 2022-06-06a) – Matlab code
- Software that performs evaluations described in Basu et al. (2022).
- Developed by Dr Nabanita Basu
- Compares performance of multiple feature-extraction methods.
- Uses relatively parsimonious statistical models to calculate likelihood ratios.
- E3 Fired Cartridge Case Comparison System 2022-06-06a.zip
– E3 Fired Cartridge Case Comparison System GUI (version 2023-06-30a) – Matlab code
- Graphical user interface that demonstrates methods described in Basu et al. (2022).
- Developed by Dr Nabanita Basu
- Feature extraction is via Zernike moments.
- Uses pretrained models to calculate likelihood ratios.
- E3 Fired Cartridge Case Comparison System GUI 2023-06-30a.zip
E3 Database of 3D Images of Fired Cartridge Cases (release 1)– Description
- This is a database of 3D images of the bases of 9 mm diameter centre-fire Luger-type cartridge cases with brass primer cups fired from semi-automatic pistols with hemispherical firing pins and parallel breech-face marks.
- Fired cartridge cases were supplied by operational forensic laboratories, law-enforcement agencies, military, and private individuals in Barbados, Canada, France, Germany, UK, and USA.
- 3D surface topography was digitally captured using Evofinder® (software version 6.6.1.17), and exported in x3p format.
- 10 cartridge cases were fired from each firearm.
- Release 1 of the database includes cartridge cases fired from 297 firearms.
– Acknowledgements
- The collection of this database was supported by Research England’s Expanding Excellence in England Fund as part of funding for the Aston Institute for Forensic Linguistics 2019–2023.
- Thanks to Dr Michael Derenovskiy and his colleagues at ScannBI Technology Europe GmbH for the loan of the Evofinder® imaging system.
- Collection of the database was coordinated by Dr Rachel S Bolton-King.
- Thanks to the organizations and individuals who donated the fired cartridge cases. To maintain their anonymity, we do not thank them by name.
- Thanks to the National Institute of Standards and Technology (NIST) for agreeing to distrubute the database.
– Download
- The database is available from the NIST Ballistics Toolmark Research Database (NBTRD).
Project Team
Links– The FBI’s Misinformation Campaign on Firearms-toolmark Testimony
- 2021-12-25 Blog post by David Kaye.
– State v. Ghigliotti, Computer-assisted Bullet Matching, and the ASB Standards
- 2022-06-11 Blog post by David Kaye.
https://forensic-data-science.net/firearms/This webpage is maintained by Geoffrey Stewart Morrison and was last updated 2023-07-12