Double Loop Podcast

Glenn Langenburg and Eric Ray

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Whether you're a practicing Latent Print Examiner or you're interested in forensics and true crime, the Double Loop Podcast is a weekly show featuring Glenn Langenburg and Eric Ray discussing latent print topics, current events in forensic science, the newest research articles, interesting guests, and analysis of notable cases from a forensic scientist perspective.

22. JAN.

Episode 288 - Close Non-matches

Happy New Year 2026! The boys are back in town, with a new game: Regional Quirkisms. After discussing Minnesota quirkisms, the guys answer a listener question from Ireland: "What's the most number of corresponding minutiae that you have seen from two impressions from different sources?". This leads to a deep dive on close non-matches. The guys share their tips, tricks, and red flag warnings for dealing with close non-matches. They discuss a few examples and talk about the relevant research on this topic.

1 t. 21 min.
13.12.2025

Episode 286 - IAI 2025 Review

Eric Ray and Glenn Langenburg talk about their week in Orlando at the 2025 IAI Educational Conference. Hear about Quality Metrics, limited examinations, and linking cases together, and hear from some of the conference attendees.

1 t. 29 min.
30.09.2025

Episode 286 - Forensic Science Ireland Interview

In this episode Eric poses to Glenn a Mandela effect question concerning household cleaning products. After that, the guys celebrate the 4th of July holiday by welcoming their guests from Ireland. Four fingerprint examiners from Forensic Science Ireland (FSI), the national forensic lab in Ireland, join the podcast. The guests are Dr. Aoife Power, Dr. Craig Mullen, Mr. Columb Doherty, and Dr. Kim Connick. Glenn and the guests talk about their time at the recent European Academy of Forensic Science (EAFS) conference in Dublin in May 2025. The examiners from FSI discuss their research, posters, and presentations from EAFS. Eric is also curious about their new AFIS system and has lots of questions about their processes. The guests discuss forensic fingerprint practices in Ireland and especially working in their new national laboratory. Forensic Science Ireland: https://forensicscience.ie/ Dr. Kim Connick: kconnick@fsi.gov.ie

1 t. 43 min.
12.08.2025

Episode 285 - Michael Whyte Interview - Latent to Latent Comparisons

In this episode, the guys start with a product-based Mandela effect question. Then they welcome back long-time friend of the show and webmaster, Michael Whyte from the New South Wales police force in Australia. Michael has a question for Glenn and Eric, regarding latent-to-latent comparisons, using latent prints as 'proxy exemplars' when the exemplars are worse than the latent prints or incomplete, and various off-shoots of these questions. The guys discuss the theoretical basis and some of the legal issues that arise in both the U.S. and Australia.

1 t. 8 min.
28.07.2025

Episode 284 - Black Box '22 - Part 2 (with Brendan Max)

In this episode, Eric stumps Glenn with a geography based Mandela Effect question. Then the guys welcome their guest commentator, Brendan Max, Public Defender and Chief of the Forensic Science Division in Chicago, Illinois. Eric, Glenn, and Brendan take a second look at the 2025 FBI/Noblis follow-up black box study for latent fingerprints. The guys had previously done a cursory review of the paper in Episode 282, and now wanted to dig in a bit into the appendices and take another look at some trends. Brendan offers his insights and shows that he’s pretty proficient with a spreadsheet too! The guys go back and forth discussing the strengths and limitations of the study and where the methodology and practice has likely improved since the original Black Box study (conducted in 2009). Article is available for free at: doi.org/10.1016/j.forsciint.2025.112457

1 t. 29 min.
26.05.2025

Episode 283 - DNA & Patterns

Glenn Langenburg and Eric Ray review two articles from Cell that focus on the genetic basis for ridge development and pattern formation. 'The developmental basis of fingerprint pattern formation and variation' by Glover, et al., and 'Limb development genes underlie variation in human fingerprint patterns' by Li, et al. Our understanding of these complex processes continues to grow, and these papers further support our field and our conclusions.

1 t. 10 min.
10.05.2025

Episode 282 - Noblis-FBI Black Box 2 Fingerprint Study

In this episode, Glenn and Eric start with a quick game of “A Truth, A Lie, and a Mandella Effect”. Then they pose a question from a listener regarding interest in a forum where listeners can go and discuss the episodes of the show, ask questions, and chat “amongst themselves”. Finally they get to the long awaited Noblis/FBI study “Black Box 2” latent fingerprint error rate study. This is a re-do of the 2011 black box study for latent fingerprint performance. This study “Accuracy and reproducibility of latent print decisions on comparisons from searches of an automated fingerprint identification system” by Hicklin, Richetelli, Taylor and Buscaglia (For Sci Intl, 370 (2025), 112457), reported the performance of 156 U.S. latent print examiner participants each reviewing about 100 latent prints/comparisons resulting in over 14,000 trials. The study reports numerous statistics of performance such as sensitivity (63%), specificity (70%), false positive error rate (0.2%), and false negative error rate (4.2%). The guys also discuss some important study design differences, plus there are a lot of data in the appendices. Finally they talk about the number of false positives made in the study (n=23) and the fact that 13 of those 23 were made by one participant and how that impacted the results. Article is available for free at: https://doi.org/10.1016/j.forsciint.2025.112457

1 t. 23 min.
06.04.2025

Episode 281 Kasey Wertheim Tribute

Eric Ray and Glenn Langenburg pay tribute to our colleague and friend. Kasey Wertheim passed away on March 7, 2025 and will be greatly missed. Please join us as we remember his legacy and contributions to the field of fingerprints and tell a few personal stories.

1 t. 1 min.

Whether you're a practicing Latent Print Examiner or you're interested in forensics and true crime, the Double Loop Podcast is a weekly show featuring Glenn Langenburg and Eric Ray discussing latent print topics, current events in forensic science, the newest research articles, interesting guests, and analysis of notable cases from a forensic scientist perspective.

Skaber

Glenn Langenburg and Eric Ray
Aktive år

2013 - 2026
Episoder

154
Vurdering

Ikke anstødeligt
Copyright

© (c) Double Loop Forensics
Websted for serie

Double Loop Podcast

Komedie

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Nyheder

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24.05.2022