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Gunshot Residue Subcommittee


Members of OSAC's Gunshot Residue Subcommittee
Members of the Gunshot Residue Subcommittee at the March 2020 OSAC Meeting in Norman, Oklahoma.
Credit: A. Getz/NIST

Officers | Members | StandardsDiscipline-Specific Baseline DocumentsResearch & Development Needs | Presentations

The Gunshot Residue Subcommittee focuses on standards and guidelines related to the analysis of evidence that results from the deposition of or physical transfer of small or minute quantities of gunshot residue.

Participate in OSAC's Organic Gunshot Residue Inter-Laboratory Study

The Organic Gunshot Residue Task Group is looking for participants to join an inter-laboratory study on the collection and analysis of organic gunshot residues. The inter-lab study is intended to support a draft standard practice the task group has developed which contains methodologies for gas chromatography/mass spectrometry (GC/MS) and liquid chromatography/mass spectrometry (LC/MS) analyses of organic gunshot residues. 

Read the invitation letter to learn more about this study and how to participate. Also, to learn more about the interest in conducting organic gunshot residue in an operational setting, please complete this brief survey


Thomas "Rusty" White, Subcommittee Chair, Texas Department of Public Safety Crime Laboratory Services

Trevor Gillis, Subcommittee Vice Chair, Santa Clara County (California) District Attorney's Crime Laboratory

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


Candice Bridge, University of Central Florida

Jesse D. Brown, Defense Forensic Science Center (including U.S. Army Criminal Investigation Laboratory)

Andrew Cohen, University of Massachusetts (Human Factors Representative)

Douglas DeGaetano, Virginia Department of Forensic Science

John Drugan, Massachusetts State Police Forensic Group

David Edwards, JEOL USA, Inc.

Dana Greely, Colorado Bureau of Investigation

Monica Joshi, Ph.D., West Chester University of Pennsylvania

Debra Joslin, Ph.D., McCrone Associates

Mary Keehan, Virginia Department of Forensic Science

Michael McCarriagher, Georgia Bureau of Investigation

Elizabeth Meli, U.S. Department of Justice (Legal Representative)

Danica Ommen, Iowa State University

Koren Powers, West Virginia State Police Forensic Laboratory

Amy Reynolds, Boston Police Crime Laboratory

Nicholas Ritchie, Ph.D., National Institute of Standards and Technology

Jason Schroeder, Harris County (Texas) Institute of Forensic Sciences

Patti Williams, ANSI National Accreditation Board (Quality Representative)

J. Matney Wyatt, Defense Forensic Science Center (including U.S. Army Criminal Investigation Laboratory)


Tier 1: On the OSAC Registry

  • None currently.

Tier 2: Published by an SDO

  • None currently.

Tier 3: Sent to an SDO

Tier 4: Under Development

  • Inorganic GSR Identification.
  • Collection of pGSR. 
  • Organic Gunshot Residue Methodology (interlaboratory study).
  • pGSR Prevalence Study (research project).

Discipline-Specific Baseline Documents

The Forensic Science Standards Board (FSSB) has provided the opportunity for OSAC Subcommittees to identify baseline documents and reference materials that best reflect the current state of the practice within their respective disciplines. 

These documents contain practical information regarding these disciplines that can help forensic scientists, judges, lawyers, researchers, other interested parties and the general public, to better understand the nature, scope, and foundations of the individual disciplines as they are currently practiced.

It is important to note that the identification of these documents in this venue does not represent an endorsement by OSAC or NIST.  Only documents that are posted on the OSAC Registries constitute OSAC endorsement. All copyrights for these documents are reserved by their owners. Subcommittee position statements or responses to data collections by the subcommittee represent the consensus opinion of the subcommittee, not necessarily the position of the entire OSAC organization or NIST.

Research & Development Needs


  • None currently.

In general, the development of standards and guidelines is transitioning from the Scientific Working Groups (SWGs) to the OSAC. Some SWGs will continue to operate to provide other resources within their discipline. The existing SWG documents will remain in effect until updated documents are disseminated by the OSAC or the SWG. SWGDAM will retain the responsibility for updating the FBI DNA Quality Assurance Standards.

– Forensic Science Standards Board: March 2015

Created July 11, 2014, Updated June 2, 2020