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Gunshot Residue Sample Collection: An Overview


Gunshot residue (GSR) can be valuable forensic evidence when presenting a case in a court of law.  It's important that a jury understands the process by which samples are collected, and are able to evaluate the importance of the results.  You can help to mitigate the work of the forensic scientist by ensuring that you are using proper sampling techniques.  This webinar will give you an overview of sampling products, collection procedures, and will strive to answer your scenario-based questions.  We hope that you will join us!

Wednesday, July 15th

2:00 pm est - 2:45 pm est
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About Our Presenter

Allison Murtha Laneve is the Manager of RJ Lee Group’s Forensic Science Department, overseeing and participating in the preparation, analysis, interpretation and reporting of gunshot residue (GSR) evidence using Scanning Electron Microscopy / Energy Dispersive Spectroscopy (SEM/EDS) techniques. She is an expert witness and has given testimony in federal, state and county courts for both the prosecution and the defense on more than 120 occasions. Allison is certified to testify in 27 U.S. states and two foreign countries.

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Who Should View This Webinar?

Police Chiefs, Sheriffs, Forensic Consultants, Forensic Agencies, Crime Laboratories, Forensic Technicians, Crime Scene Investigators, Litigators

Criminal Forensics Experts & Laboratory


RJ Lee Group's criminal forensics experts have worked with more than 500 law enforcement agencies throughout the United State and abroad. We are qualified in 32 states and the District of Columbia, as well as in New Zealand, Bermuda and the U.S. and British Virgin Islands. 

We know the microscopic material found at the a crime scene is often a crucial element in a criminal case. We ensure all sample integrity by handling the evidence in a clean testing environment using contamination checks and calibration controls.

We provide scientific resolution. Feel free to Contact Us to learn more. 

Contact Criminal Forensics
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More RJ Lee Group Services

Gunshot Residue Analysis (GSR Testing)

We are accredited by ANAB for primer GSR analysis and gunshot distance determination, RJ Lee Group is also the only private laboratory in the United States accredited by ANAB-International for gunshot distance determination.

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Trace Evidence Analysis

Trace evidence analysis is the identification and/or comparison of small, possibly microscopic evidence, transferred by contact or discharged by movement during the commission of a crime. This evidence can often link a suspect to another individual or to the crime scene itself. It is the mission of the trace evidence analyst to identify and interpret these materials for use in legal proceedings.

Trace Evidence Analysis

Instrumentation and Technology

Our forensic scientists use a variety of techniques and instrumentation to determine trace composition including: 

  • Polarized light microscopy (PLM)
  • Stereomicroscopy
  • Manual and computer-controlled scanning electron microscopy (SEM and CCSEM)
  • Raman Spectroscopy
  • Fourier Transform Infrared (FTIR) Spectroscopy
Instrumentation & Techniques