128 episodes

Glenn Langenburg and Eric Ray discuss latent prints, the latest latent print research, forensic science in general, and regular interviews with people in the latent print field.

Double Loop Podcast Glenn Langenburg and Eric Ray

    • Natural Sciences
    • 4.6 • 7 Ratings

Glenn Langenburg and Eric Ray discuss latent prints, the latest latent print research, forensic science in general, and regular interviews with people in the latent print field.

    Episode 231 - Review of Carter, et al. (2020) Paper on Conclusion Scales

    Episode 231 - Review of Carter, et al. (2020) Paper on Conclusion Scales

    After some Halloween talk, Eric and Glenn discuss this episode’s research article: “The Utility of Expanded Conclusion Scales During Latent Print Examinations” by Carter, Vogelsand, Vanderkolk, and Busey in J Forensic Sciences (online, 2020). This study examines the results of 27 experts who completed 30 comparisons under a 3-point SWGAST scale versus 30 comparisons under a 5-point OSAC scale. The guys discuss error rates, changes in apparent decision thresholds, and the rate of misleading evidence of “support for…” decisions.

    Article: https://onlinelibrary.wiley.com/doi/abs/10.1111/1556-4029.14298?af=R

    Interpol Paper Reference: https://www.sciencedirect.com/science/article/pii/S2589871X20300139

    • 1 hr 10 min
    Episode 230 - Fingerprint Error Rate in Close Non-Matches

    Episode 230 - Fingerprint Error Rate in Close Non-Matches

    In this Halloween episode, Eric and Glenn discuss a new paper published by Koehler and Liu titled “Fingerprint error rate on close non-matches” (Journal of Forensic Sciences, Sept. 2020). The paper raises a lot of discussion between the guys regarding close non-matches, inconclusives, training, and testimony. They each have a different take on some of the key issues in the paper, but in the end identify what common ground on which they agree.

    • 1 hr 25 min
    Episode 229 - Bob Garrett

    Episode 229 - Bob Garrett

    Glenn Langenburg and Eric Ray pay special tribute this week to a giant in the fingerprint world, Bob Garrett. With the passing of Bob and a few other close friends and colleagues, Glenn and Eric want to look back at the contributions of Bob Garrett in particular. In his single year as president of the IAI, he was instrumental in responding to the NAS Report, addressing the McKie controversy, and moving forward the Standardization II Committee. Please join us in remembering Bob and all of the other friends and colleagues that we've recently lost.

    • 1 hr 22 min
    Episode 228 - Knuckle-Crease Daubert Hearing

    Episode 228 - Knuckle-Crease Daubert Hearing

    In this episode, Glenn and Eric discuss a recent case Glenn was involved in: a knuckle-crease case. The case had a Daubert hearing in addition to trial testimony for jurors. The guys discuss if non-friction ridge skin associations would meet the Daubert factors. If you were preparing for such a hearing, what research and testing would you need to demonstrate expertise of the expert, or demonstrate reliability of the methods and principles? Does expertise in fingerprints using ACE-V translate to the comparison of non-friction ridge skin or any other objects you might encounter in photographs? Stay tuned…their answers may surprise you!

    • 1 hr 30 min
    Episode 227 - NY Firearms Case

    Episode 227 - NY Firearms Case

    Glenn Langenburg and Eric Ray review a recent court decision on firearms testimony. NY v Ross was a recent Frye case where the testimony of firearms examiners was restricted to only class characteristics. Was this a fair decision? Did the judge raise good points? How does this case relate to latent print testimony and latent print accuracy studies? Join us for an hour of fun talk as we dive deep into the nerdy intersection of science and law.
    https://legalaidnyc.org/wp-content/uploads/2020/07/Ross-Frye-Decision_Full-.pdf

    • 1 hr 20 min
    Episode 226 - Best Latent Print Books

    Episode 226 - Best Latent Print Books

    Glenn Langenburg and Eric Ray were recently asked which latent print books they recommend the most. This episode they talk through the absolute creme de la creme of fingerprint tomes. New books, old books, green books, blue books. Whether you're developing or comparing ridges, we've got a list of what you need to read. Also make sure to join us Wed nights at 8pm EDT for Virtual Happy Hour at https://discord.gg/b39pp6j

    • 1 hr 1 min

Customer Reviews

4.6 out of 5
7 Ratings

7 Ratings

ccamc21 ,

Important information

Great subject matter and a must for all fingerprint examiners. I love this podcast

Sycophant1 ,

We're hooked!

We listen regularly at work. Entertaining and informative. Good way to stay up to date with court trends in North America and beyond. Hopefully they come to Canada.

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