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Ignitable Liquids, Explosives, & Gunshot Residue Subcommittee

OSAC Ignitable Liquids, Explosives & GSR SC icon only

The Ignitable Liquids, Explosives, & Gunshot Residue Subcommittee focuses on standards and guidelines related to the scientific examination and analysis of materials associated with fire and explosion investigations and the analysis of evidence that results from the deposition of or physical transfer of small or minute quantities of gunshot residue.

Officers | Members | Standards | Other Work Products




Brenda Christy, Subcommittee Chair, Virginia Department of Forensic Science

Thomas (Rusty) White, Subcommittee Vice Chair, Texas DPS Crime Laboratory

Emily Weber, Subcommittee Executive Secretary, Hamilton County Coroner's Office 


Michael Baker, Missouri State Highway Patrol

Marissa Bluestine, Quattrone Center for the Fair Administration of Justice at the University of Pennsylvania Law School (Legal Task Group representative)

Jesse Brown, Defense Forensic Science Center (including USACIL)

Jessica Brown, Massachusetts State Police Crime Laboratory

Douglas Byron, Forensic & Scientific Testing, Inc.

Ryan Campbell, St. Louis County Police Crime Laboratory

Erika Chen, New York Police Department Laboratory

John Chester, Indiana State Police

Michelle Clarke, Bureau of Alcohol, Tobacco, Firearms, and Explosives 

Andrew Cohen, University of Massachusetts, Amherst (Human Factors Task Group representative)

Lauryn DeGreeff, Florida International University

Andreana Dimakakos, Bureau of Alcohol, Tobacco, Firearms and Explosives

Michelle Evans, Bureau of Alcohol, Tobacco, Firearms and Explosives

David Freehling, North Carolina State Crime Laboratory

Tarah Helsel, RJ Lee Group, Inc. 

Laura Hernandez, Verity Labs, Inc.

Steven Hoenig, American Public University

Monica Joshi, West Chester University of Pennsylvania 

Mary Keehan, Virginia Department of Forensic Science

Kim Kunkler, Marshall University

Christine Marsh, Federal Bureau of Investigation

Kristina May, Harris County Institute of Forensic Sciences

Michael McCarriagher, Georgia Bureau of Investigation

Richard McLaughlin, Oxford Instruments

Danica Ommen, Iowa State University (Statistics Task Group representative)

Kyle Osborne, United States Criminal Investigation Laboratory

Raleigh Parrott, Federal Bureau of Investigation

Jill Prados, Louisiana State Police Crime Laboratory

Amy Reynolds, Boston Police Department Crime Laboratory

Rodney Simmons, Wyoming Division of Criminal Investigation (Quality Task Group representative)

Lisa Windsor, Tucson Police Department Crime Laboratory

Kelly Wouters, Armstrong Forensic Laboratory, Inc. 


Published by a Standards Developing Organization (SDO) and on the OSAC Registry 

Published by an SDO 

to access the astm standards listed above, visit the access to standards webpage. 

Sent to an SDO

Under Development

  • OSAC 2022-S-0002, Standard Practice for the Analysis of Organic Gunshot Residue (oGSR) by Gas Chromatography-Electron Ionization Mass Spectrometry.
  • OSAC 2022-S-0003, Standard Practice for the Analysis of Organic Gunshot Residue (oGSR) by Liquid Chromatography Mass Spectrometry.
  • OSAC 2022-S-0023, Standard Practice for the Forensic Analysis of Explosives by Polarized Light Microscopy.
  • Standard Practice for the Characterization of Solid Oxidizer and Fuel Explosives. 
  • Standard Practice for Collection of Primer Gunshot Residue (pGSR) Particles from Inanimate Objects.
  • Standard Practice for Classification of Particles as pGSR. 
  • Standard Practice for the Manual Reacquisition of Images and Spectra of pGSR Particles. 
  • Standard Guide for the Performance/Conduction of Automated pGSR analysis by SEM/EDS.
  • Standard Practice for Quality Assurance in pGSR Analysis.

Other Work Products

Reference Documents

Research & Development Needs

Standards Development Maps

Discipline-Specific Bibliographies and Bibliographic References 

These documents may contain information to help forensic scientists, judges, lawyers, researchers, and other readers better understand the nature, scope, and foundations of the individual disciplines as currently practiced. The identification of these documents does not represent an endorsement by OSAC or NIST. Only standards that are posted on the OSAC Registry and Technical Guidance documents, are endorsed by OSAC. The referenced documents may be subject to copyright. Note: Subcommittee position statements or responses to data collections by the subcommittee do not necessarily represent the position of OSAC or NIST.

Historical References:


TWGFEX: Fire Debris Training:

Gunshot Residue

Created August 28, 2020, Updated October 25, 2022