Virbrational Spectroscopy for the Analysis of Organic Gunshot Residue: Detection, Identification and Characterization

Gunshot residue is comprised of tiny particles resultant from the discharge of a firearm. It can be subdivided into two classes—organic gunshot residue {which stems mainly from the propellant in an ammunition cartridge) and inorganic gunshot residue (which stems mainly from the primer and bullet of an ammunition cartridge). Organic gunshot residue (OGSR) presents potentially complementary evidence to the currently standardized analysis of inorganic gunshot residue (IGSR). OGSR is more readily recovered at crime scenes due to its size, and its common main components are not generally found in the environment-this is in contrast to IGSR which has many commonplace potential false positives associated with it.

This project is comprised of two main objectives. Objective 1 will aim to develop a two-step methodology for the easy detection and identification of organic gunshot residues using a combination of fast fluorescence mapping and Raman spectroscopy. Objective 2 will aim to investigate the capability of Raman spectroscopy and attemiated total reflection Fourier-transform infrared spectroscopy (ATR FT-IR) for differentiating organic gunshot residue samples stemming from different manufacturers. Obbjective 2 will involve the analysis of the OGSRs investigated using mass spectrometry in order to accurately correlate chemical composition to vibrational spectroscopic data. The major outcome of their work will be to make strides with regards to the analysis of OGSRs-which is a current hot topic in forensic science. Major deliverables will include required progress reports, conference presentations, and journal publications.

Note: This project contains a research and/or development component, as defined in applicable law," and complies with Part 200 Uniform Requirements - 2 CFR 200.210(a)(14). CA/NCF