Double Loop Podcast
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.
- Update frequency
- every 22 days
- Average duration
- 67 minutes
- Episodes
- 151
- Years Active
- 2013 - 2025
Episode 245 - Errors and CVs and Disclosure
Eric Ray and Glenn Langenburg go round and around on the topic of how to disclose errors to defense. Should your errors be listed in your CV? Should they be disclosed to defense automatically? Only o…
01:10:59 |
Thu 31 Mar 2022
Episode 244 - Hillary Moses Daluz Interview
In this episode, the guys interview fingerprint examiner, multi-book author, and instructor, Hillary Moses Daluz . Hillary discusses her new book "Courtroom Testimony for the Fingerprint Examiner" (…
00:56:05 |
Sat 05 Feb 2022
Episode 243 - New Years Grab Bag
Eric Ray and Glenn Langenburg catch up on a mix bag of topics in the first episode of 2022. Emails on the new conclusion proposal, setups for photography with transmitted light, and the main topic on…
01:00:13 |
Mon 31 Jan 2022
Episode 242 - Review of ASB Documents 2021
In this episode, the guys talk about Thanksgiving: Eric’s amazing food preparation and Glenn’s travel to Canada to teach. Eric also gives a plug for Kasey Wertheim’s fingerprint book library that is…
01:02:00 |
Mon 27 Dec 2021
Episode 241 - Blind Proficiency Testing Paper
Eric Ray and Glenn Langenburg discuss the recent paper on Blind Proficiency Testing from the Houston Forensic Science Center: "Latent print quality in blind proficiency testing: Using quality metrics…
00:55:13 |
Wed 01 Dec 2021
Episode 240 - Todd Weller returns to discuss inconclusives
The long awaited/dreaded return of the “Dad Joke Intro”! In this episode, Todd Weller (firearms expert) returns to the show to talk to Eric and Glenn about the article on inconclusive decisions by I…
01:08:49 |
Thu 21 Oct 2021
Episode 239 - 2021 IAI Conference
Return with Glenn and Eric to the IAI Conference in Nashville, TN. The guys are joined by Josh Connelly, Kurt Aebersold, JP Rodriguez, and Claudine Carter Pereira. New accuracy studies, open field re…
00:36:48 |
Mon 27 Sep 2021
Episode 238 - Dror and Scurich Article
Glenn Langenburg and Eric Ray review the 2020 article from Itiel Dror and Nicholas Scurich. "(Mis)use of scientific measurements in forensic science" was published in Forensic Science International: …
01:16:10 |
Tue 06 Jul 2021
Episode 237 - Testifying After an Error
Glenn Langenburg and Eric Ray discuss how to testify in court after an error occurs. Examiners nervous about upcoming testimony can find tips whether you made the error or a co-worker made an error a…
01:13:25 |
Sun 25 Apr 2021
Episode 236 - Mindset Paper (Palms Part Deux!)
In this episode, the guys return for Round 2 with Dr. Heidi Eldridge and Prof. Christophe Champod. This time, they discuss the second paper arising from the palm print black box study (discussed in …
01:06:25 |
Thu 25 Mar 2021
Episode 235 - Todd Weller Interview
Glenn Langenburg and Eric Ray are joined by Todd Weller to discuss the firearms/toolmarks discipline. Todd was involved in the NY firearms case from Episode 227 and shares his experiences there. The …
01:37:53 |
Fri 12 Mar 2021
Episode 234 - Palm Print Black Box Study
In this episode, Eric and Glenn are joined by Dr. Heidi Eldridge and Prof, Christophe Champod, the authors of "Testing the accuracy and reliability of palmar friction ridge comparisons - A black box …
01:28:49 |
Fri 26 Feb 2021
Episode 233 - GYRO Accuracy Paper
Glenn Langenburg and Eric Ray finally get back on track with a review of a recent article on GYRO markings. "Evaluating the Accuracy and Weight of Confidence in Examiner Minutiae Annotations" was wri…
01:09:21 |
Tue 16 Feb 2021
Episode 232 - Differing Conclusions Article
Glenn Langenburg and Eric Ray review the newest article from Austin Hicklin, Bradford Ulery, Madeline Ausdemore, and JoAnn Buscaglia. Why do latent fingerprint examiners differ in their conclusions? …
01:29:10 |
Wed 06 Jan 2021
Episode 231 - Conclusion Scales Article
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 B…
01:10:34 |
Mon 23 Nov 2020
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 …
01:25:12 |
Wed 28 Oct 2020
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…
01:22:53 |
Tue 13 Oct 2020
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…
01:30:16 |
Wed 16 Sep 2020
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 characteris…
01:20:19 |
Wed 02 Sep 2020
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 …
01:01:57 |
Mon 20 Jul 2020
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