Prior to joining McCrone Associates in 2018, Sandra worked in the field of forensic trace evidence analysis for more than 16 years. She worked for the FBI Laboratory Trace Evidence Unit from 1997 to 2013 and was a member of the Indian Country Evidence Task Force. She analyzed hairs, fibers, fabric damage, and feathers using a range of instrumentation including light microscopy, polarized light microscopy, fluorescence microscopy, microspectrophotometry, and infrared spectroscopy. She has taught numerous workshops and short courses on crime scene evidence collection and trace evidence analysis. She is a Fellow of the American Academy of Forensic Sciences, a founding member and President-Elect of the American Society of Trace Evidence Examiners, and a Fellow of the American Board of Criminalistics (Hairs and Fibers). Sandra was a member of the fiber subgroup within the Scientific Working Group for Materials Analysis (SWGMAT) from 1999 until 2013 and currently serves on the Materials (trace) subgroup within the Organization of Scientific Area Committees. She has published in the areas of forensic analysis of hairs, fibers, fabric damage, and feather identification.
Ph.D. Biological Anthropology, the Pennsylvania State University, 2018
M.S. Forensic Anthropology, Boston University School of Medicine, Boston, 2012
M.F.S. Forensic Science, George Washington University, Washington, DC, 1996
B.A. Anthropology and Political Science, University of Michigan, Ann Arbor, 1993
Sandra L. Koch, Mark D. Shriver, Nina G. Jablonski. (2018). Variation in human hair ultrastructure among three biogeographic populations. Journal of Structural Biology. ISSN 1047-8477.
Nehse, K and S.L. Koch. (2018). New Fibre Developments. In Forensic Examination of Fibres, J. Robertson, C. Roux, and K.G. Wiggins (Eds). 3rd ed. CRC Press.
Tridico, S.R., Koch, S.L., Michaud, A., Thomson, G., Kirkbride, K.P., and Bunce, M. (2014). Interpreting biological degradative processes acting on mammalian hair in the living and the dead: Which ones are taphonomic? Proceedings of The Royal Society, B:Biological sciences, 281(1796), 10.1098/rspb.2014.1755.
Koch, S.L., Michaud, A. and Mikell, C. (2013). Taphonomy of Hairs: A study of postmortem root banding of hairs. Journal of Forensic Sciences, Vol. 58, No. S1.
Dove, C. and Koch, S.L. (2011) Microscopy of Feathers: A Practical Guide for Forensic Feather Identification. Journal of the American Society of Trace Evidence Examiners, Vol. 1, Issue 1. Reprinted in the Microscope V 59 (2) 2011.
Deedrick, D.W. and Koch, S.L. (2004). Microscopy of Hair Part II: A Practical Guide and Manual for Animal Hairs. Forensic Science Communications, Vol. 6, Number 3.
Deedrick, D.W. and Koch, S.L. (2004). Microscopy of Hair Part I: A Practical Guide and Manual for Human Hairs. Forensic Science Communications, Vol. 6, Number 1.
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