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Glenn Langenburg - Photograph by Reyna Shelton Photography

Glenn Langenburg – Photograph by Reyna Shelton Photography

Glenn Langenburg
Phone: 651-206-3198
Biography / Curriculum Vitae

Glenn Langenburg is a certified latent print examiner.  Currently, he is the Drug Chemistry Supervisor at the Minnesota Bureau of Criminal Apprehension and also manages a consulting business (Elite Forensic Services, LLC). He has experience with crime scenes and bloodstain pattern evidence; he is certified as a general criminalist by the American Board of Criminalistics. Glenn has a Ph.D. in Forensic Science from the University of Lausanne in Switzerland. His thesis, “A Critical Analysis and Study of the ACE-V Process”, focuses on decision-making and the application of ACE-V by fingerprint experts. Glenn has lectured and hosted workshops nationally and internationally at forensic science conferences in the United States, Australia, Canada, and Europe on topics including Daubert issues, research, probabilistic approach, error rates, and fingerprint methodology. He has published numerous research articles in peer reviewed journals.  Glenn had the privilege of serving the fingerprint community as a member of SWGFAST (Scientific Working Group for Friction Ridge Analysis, Study, and Technology) for 10 years.  He has a weekly podcast on fingerprint issues with co-host Eric Ray called the Double Loop Podcast.

Curriculum Vitae



  • University of Lausanne, Switzerland; Ph.D. Forensic Science, 2012
  • University of Minnesota, M.S. Analytical Chemistry, 1999
  • Michigan State University, B.S. Forensic Science, 1993


  • Sep. 2013 – Present :
    • Minnesota Bureau of Criminal Apprehension Forensic Science Laboratory, Drug Chemistry Section, Supervisor
  • Jan. 2000 – Sep. 2013:
    • Minnesota Bureau of Criminal Apprehension Forensic Science Laboratory, Latent Print Section
  • Jan. 2003 – May 2010:
    • Metropolitan State University, Community Faculty
  • Sep. 2003 – May 2005:
    • Hamline University, Adjunct Faculty
  • June 1995 – Jan. 2000:
    • Pace Analytical Inc./3M Environmental Laboratory, Research Chemist
  • May 1993 – Sept. 1993:
    • Dundee Royal Infirmary Dept. of Forensic Medicine, Toxicology Summer Internship


  • International Association for Identification (IAI)
  • National and Minnesota Division membership (since 2000)
  • Canadian Identification Society (CIS) (since 2002)
  • Midwest Association of Forensic Scientists (MAFS) (since 2003)
  • Elected member to SWGFAST (Scientific Working Group for Friction Ridge Analysis, Study, and Technology) (Feb 2004 – Aug 2014)
  • Fingerprint Society (U.K.), fellow status (2006-2010)
  • IAI Committee—Standardization II Committee (2008-2010)
  • NIST-NIJ Committee—Expert Working Group on Human Factors in Latent Print Analysis (2008-2011)


  • Status as a certified latent print examiner (IAI) granted May 2003
  • Status as a certified fellow of criminalistics (ABC) granted July 2011
  • Editorial review board for Journal of Forensic Identification (since 2006)
  • Distinguished Member of the IAI Award (2007)
  • Recipient of Inaugural IFRG “Roland Menzel Award” (2007)
  • Ethics Committee for MAFS (2006-2010)
  • MAFS “New Scientist Award” (2002)
  • Minn. DPS Forensic Science Lab Service Recognition Award (2002)
  • MAFS Latent Print Section Coordinator (2002-2011)


  • Langenburg, G; Bochet, F; Ford, S.  A Report of Statistics from Latent Print Casework.  Forensic Policy & Management: An International Journal2014, 5 (1-2), 15-37, doi: 10.1080/19409044.2014.929759.
  • Langenburg, G.  The consideration of fingerprint probabilities in the courtroom.  Australian Journal of Forensic Sciences2013, doi: 10.1080/00450618.2013.784360.
  • Langenburg, G; Hall, C. Friction Ridge Skin: Comparison and Identification in Wiley Encyclopedia of Forensic Science.  Eds Jamieson, A; Moenssens, A; John Wiley: Chichester.  doi: 10.1002/9780470061589.fsa355.pub2.  Published 15th March, 2013.
  • Praska, N; Langenburg, G. Reactions of latent prints exposed to blood. Forensic Sci Intl, 2013, 224, 51-58.
  • Langenburg, G. A Critical Analysis and Study of the ACE-V Process. PhD thesis, Ecole des Sciences Criminelles / Institut de Police Scientifique, Université de Lausanne, Switzerland, 2012.
  • Langenburg, G., Champod, C., Gennessay, T. Informing the Judgments of Fingerprint Analysts Using Quality Metric and Statistical Assessment Tools. Forensic Sci Intl, 2012, 219 (1-3), 183-198; doi:10.1016/j.forsciint.2011.12.017.
  • Neumann, C; Langenburg, G, et al. Operational benefits and challenge of the use of fingerprint statistical models: a field study. Forensic Sci Intl, 2011, 212, 32-46.
  • Langenburg, G; Champod, C. The GYRO System—A Recommended Approach to More Transparent Documentation. Journal of Forensic Identification 2011 61 (4), 373-384.
  • Mnookin, J., Langenburg, G, et al. The Need for a Research Culture in the Forensic Sciences. UCLA Law Review, 2011, 58 (3), 725-779.
  • Langenburg, G. Scientific Research Supporting the Foundations of Friction Ridge  Examinations”, Chapter 14 in The Fingerprint Source Book; Eds.: McRoberts, A; Fitzpatrick, F., U.S. Department of Justice, National Institute of Justice,  Washington, D.C., 2011.
  • Langenburg, G., Champod, C., Gennessay, T. Jones, J. Informing the Judgments of Fingerprint Analysts Using Quality Metric and Statistical Assessment Tools, Summary Report to the Midwest Forensics Resource Center. Midwest Forensic Resource Center (MFRC) Research and Development Program Summary, 2010, November, 42-44.
  • Dror, I, Langenburg, G., et al. Cognitive issues in fingerprint analysts: inter- and intra-expert consistency and effect of a ‘target’ comparison. Forensic Sci Intl,  2010, 208, 10-17.
  • Langenburg, G. Friction Ridge Skin: Comparison and Identification. In Wiley Encyclopedia of Forensic Science, eds. Jamieson, A; Moenssens, A. John Wiley & Sons, Ltd, U.K., 2009.
  • Langenburg, G; Champod, C; Wertheim, P. Testing for potential contextual bias effects during the verification stage of the ACE-V methodology when conducting fingerprint comparisons” J Forensic Sci 2009, 54 (3), 583-590.
  • Langenburg, G. A performance study of the ACE-V process: A pilot study to measure the accuracy, precision, repeatability, reproducibility, and biasability of conclusion resulting from the ACE-V process, J Forensic Identification 2009, 59 (2), 219-257.
  • Langenburg, G. Deposition of Bloody Fingermarks” J Forensic Ident. 2008 58 (3), 355-389.
  • Langenburg, G. Letter to Editor re: Saks and Koehler “The Coming Paradigm Shift in Forensic Science”, Science, 3 Feb 2006, vol 311.
  • Langenburg, G. A Report of Latent Print Examiner Accuracy During  Comparison Training Exercises” J Forensic Identification 2006, 56 (1), 55-93.
  • Langenburg, G. “Ask the Expert” column for Scientific American, 292 (5), May  2005.
  • Langenburg, G. Pilot Study: A Statistical Analysis of the ACE-V Methodology—the Analysis Stage,” J Forensic Identification 54 (1), 2004, 64-79.
  • Langenburg, G. Defense Against the Dark Arts: Defending Against the Critic’s Curse, The Chesapeake Examiner 2003, 41, Spring volume.



Carey Hall – Photograph by Reyna Shelton Photography

Carey Hall

Carey Hall is a Forensic scientist working for the Minnesota Bureau of Criminal Apprehension. Carey has worked in latent prints for 5 years and is also an I.A.I. Certified Latent Print Examiner. Previously, she was employed for the Phoenix Police Department and now has a unique perspective on the variety of different office policies, workflow and technology within various agencies. She recently obtained her Masters degree in Legal Studies from Sandra Day O’Connor College of Law, at Arizona State University, where she worked to better understand the criticisms of forensic science and how it might be improved. Standard setting and policy creation are Carey’s biggest interests, specifically, how scientific and empirical research can lead to adopting better policies.
Eric Ray

Eric Ray

Eric Ray
Email: ericemail
Biography / Curriculum Vitae

Eric Ray is a Criminalist with the Arizona Department of Public Safety in the Latent Print Unit. Eric is a Certified Latent Print Examiner and a member of the International Association for Identification Special Committee on Probability Modeling; Training and Evaluation. Locally, he is a Board Member and the webmaster for the Arizona Identification Council. Eric has worked to design protocols at his agency to reduce erroneous exclusions in latent print comparisons and has been invited to present this topic at conferences and for agencies around the country.

Curriculum Vitae



  • University of Arizona, B.S. Biochemistry / Molecular & Cellular Biology, 2000


  • Jun 2007 – present:
    • Criminalist with Arizona Department of Public Safety Crime Laboratory, Latent Print Unit
  • Sep 2003 – Jun 2007:
    • Field Service Representative with GE Infrastructure: Water & Process Technologies (formerly Ionics / Ecolochem)
  • Feb 2001 – Sep 2003:
    • Clinical Laboratory Specialist with Blood Systems, Inc.
  • Sep 1999 – Feb 2001:
    • Research Technician with University of Arizona – Arizona Cancer Center


  • International Association for Identification (IAI) (since 2008)
  • Arizona Identification Council (AIC) (since 2008)
  • IAI Special Committee on Probability Modeling; Training and Evaluation (since 2012)


  • IAI Certified Latent Print Examiner granted Feb 2010
  • AZ DPS Scientific Analysis Bureau Employee of the Year – 2012


  • Ray, E.; Dechant, P. Sufficiency and Standards for Exclusion Decisions, Journal of Forensic Identification. (Publication pending)
  • Ray, E. Frequency of Patterns in Palms, Journal of Forensic Identification, 2012, 62 (6), 568-587.


Cedric Neumann, Ph.D.

Looking to host “From Fingerprint Individualization to Fingerprint Statistics: Statistics Applied to ACE-V” Course?  Contact Cedric Neumann at