Impression Session: Firearms and Toolmarks
This training was presented as a part of the National Center on Forensics Conference at George Mason University on August 10th, 2023. In this session, NIST Senior Forensic Science Research Manager Rob Thompson and FBI Supervisory Physical Scientist/Forensic Examiner Michelle Machalka introduce the concepts of firearm and fingerprint impressions. This session is useful for understanding what impressions are, how they transfer, how they are collected, how they are analyzed, and what challenges analysts encounter.
This event was hosted by the National Center on Forensics under an award from the National Institute of Justice.
Disclaimer:
Opinions or points of view expressed in these recordings represent those of the speakers and do not necessarily represent the official position or policies of the U.S. Department of Justice. Any commercial products and manufacturers discussed in these recordings are presented for informational purposes only and do not constitute product approval or endorsement by the U.S. Department of Justice.
- Swab Touch Spray Mass Spectrometry for Rapid Analysis of Organic Gunshot Residue from Human Hand and Various Surfaces Using Commercial and Fieldable Mass Spectrometry Systems
- Likelihood Ratio Computation for Multivariate Trace Evidence
- Instrumental Analysis of Gunshot Residue—Reconstruction of Crime Scenes