Rephonic
Artwork for Double Loop Podcast
Forensic Science
Fingerprint Analysis
Texas Forensic Science Commission
Fingerprint Examination
Latent Print Identification
Ridge Flow Analysis
Research Methodology
IAFS Conference
Phalange Patterns
Forensic Standards
Josephine Herbert
Fingerprints
Henry Swafford
CODIS
Jeremiah Peacemaker Case
Kendra Owen
DNA Evidence
Forensics
Accreditation In Forensics
NIST

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.

PublishesMonthlyEpisodes155Founded12 years ago
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Artwork for Double Loop Podcast

Latest Episodes

Glenn Langenburg and Eric Ray interview Angela Tonietto about her recent article on the frequency of patterns in palm prints. ("Patterning in the Distal Portions of the Palms as a Key to Palm Print Identification". 2025, 75-3, p.274.) The research an... more

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... more

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.

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 Irel... more

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 Er... more

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 t... more

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... more

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, an... more

Key Facts

Accepts Guests
Contact Information
Podcast Host
Number of Listeners
Find out how many people listen to this podcast per episode and each month.

Recent Guests

Aoife Power
Fingerprint examiner at Forensic Science Ireland
Forensic Science Ireland
Episode: Episode 286 - Forensic Science Ireland Interview
Kim Connick
Fingerprint examiner at Forensic Science Ireland
Forensic Science Ireland
Episode: Episode 286 - Forensic Science Ireland Interview
Craig Mullen
Fingerprint examiner at Forensic Science Ireland
Forensic Science Ireland
Episode: Episode 286 - Forensic Science Ireland Interview
Columb Doherty
Fingerprint examiner at Forensic Science Ireland
Forensic Science Ireland
Episode: Episode 286 - Forensic Science Ireland Interview
Michael Whyte
Fingerprint expert working with the New South Wales Police Force Fingerprint Operations Unit
New South Wales Police Force
Episode: Episode 285 - Michael Whyte Interview - Latent to Latent Comparisons
Brendan Max
Chief Public Defender for Forensic Science in Chicago, Illinois.
Forensic Science Division
Episode: Episode 284 - Black Box '22 - Part 2 (with Brendan Max)
Ruby O'Connor
Author and researcher involved in fingerprint examination studies
Episode: Episode 278 - Aussie Paper on Examiner Disagreements
Dr. Sarah Chu
Director of Policy and Reform at the Perlmutter Center for Legal Justice
Yeshiva University
Episode: Episode 277 - Sarah Chu Interview
Mallory McCormick
Current board member and past president of CBD IAI
DC Department of Forensic Sciences
Episode: Episode 275 - 2024 IAI Conference: The Reno Recap

Hosts

Glenn Langenburg
Co-host with a strong background in forensic science, leading discussions on various forensic topics including fingerprint analysis and the implications of contemporary issues in the field.
Eric Ray
Co-host known for engaging discussions on forensic science, particularly relating to fingerprint examination and current trends in the field.

Reviews

4.7 out of 5 stars from 128 ratings
  • Best Podcast Ever!

    I listened to these two cats on the recommendation of a couple of friends (thanks Trudy Cruise & Matt Covay). They are witty and their forensic takes are spot on.

    Keep up the good work fellas!!!

    Apple Podcasts
    5
    Liams Big Papa
    United Statesa year ago
  • Very helpful!

    Amazingly helpful content! I am constantly sharing episodes with my coworkers in the field of forensics. There are useful lessons in the episodes even if you aren’t specifically in the latent print discipline. The hosts are also great trainers.

    Apple Podcasts
    5
    mazyberry
    United States2 years ago
  • The best!

    Easy to listen to because of Eric and Glenn’s hilarious banter. Love listening at work, in the car and at home. Listening to this podcast convinced me to start attending the IAI, and I am hooked.

    Keep up the great work!

    I appreciate you guys!

    Apple Podcasts
    5
    Jenn 🇨🇦
    Canada2 years ago
  • Chair rail vs chair lift

    Enjoyed episode 177 with Bart Epstein. Was a little confused at the end of podcast when talking about the “chair rail” Did they mean chair lift? Two different things.

    Apple Podcasts
    4
    wjs1955
    United States3 years ago
  • Great podcast!

    I’ve been a avid listening of the DLP for a few years and I have now taken educational courses with both of the hosts which gives me a better understanding of their personalities! Lol! They are both awesome with great perspectives! Grateful that they continue to tackle relevant topics within the discipline and even some popular pop culture topics (like shows, documentaries, etc). I love it when they break down research that comes out in a way that make it easier to understand and articulate. Tha... more

    Apple Podcasts
    5
    Star5521
    United States5 years ago
  • Very Interesting

    The hosts are great, and there’s a lot of information regarding fingerprint analysis, even fir the layman. While sometimes it can have jargon that you have to have a bit of experience - either in the field or in forensics in general - it’s still a fascinating look at both the mechanics and the techniques in identification, with specific cases sometimes given as examples.

    Apple Podcasts
    5
    LeoFlash
    United States5 years ago
  • Essential listening for FP examiners

    Excellent and entertaining info for FP examiners

    Apple Podcasts
    5
    ccamc21
    Canada5 years ago
  • Kick starts my CPD

    Thanks Eric and Ray, I’m a UK fingerprint expert and I’ve been following your series closely. It’s been very instructive and helps me in finding new research papers / complete my CPD hours 👍🏻

    Apple Podcasts
    5
    jdk70
    United Kingdom5 years ago
  • Great podcast for Forensic Scientists and enthusiasts!

    Love tuning into these guys to hear their views and assessment of all the latest research, stories, and other interesting cases pertaining to forensic science, and more importantly, latent print evidence.

    Apple Podcasts
    5
    No1WhyteGuy
    Australia5 years ago
  • Very intriguing

    I really enjoy this show. Thanks!

    Apple Podcasts
    5
    Megdarling
    United States6 years ago
  • Enjoyable trade podcast. They don't explain things for the layperson so much of the technical detail is lost on me but Glen and Eric are good company to listen to. Comedy bronze.

    Podcast Addict
    5
    Dopi Man
    6 years ago
  • Great forensic geek podcast

    Great podcast for anyone in the field of friction ridge examinations. But they also have quite a few episodes on popular true crime cases which they dissect in detail as only two forensic experts can do. At first I came for the episodes on scholarly papers because, I don’t have time to read them and when I do, I don’t understand them. Glenn and Eric do a great job of making sense of these papers for those of us with common levels of intelligence. But I later found I enjoyed the interview and... more

    Apple Podcasts
    5
    Danny 5028
    United States6 years ago
  • Important information

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

    Apple Podcasts
    5
    ccamc21
    Canada6 years ago
  • Pure Forensic Information

    The contrast in expertise between Eric and Glen always makes for an interesting conversation. They look at a variety of cases in a purely informative and forensic point of view that is so valuable.

    Apple Podcasts
    5
    Valvied
    United States7 years ago
  • Very informative

    I don’t subscribe to many podcasts, but this one is on my list. I very much enjoy the conversing, agreeing and disagreeing between Glenn and Eric. Oftentimes I learn about new topics in our field first through this site. I have assigned my trainees to listen to many of the episodes as a training requirement. Thanks. And keep up the great work.

    Apple Podcasts
    5
    Remtohvfun
    United States7 years ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Listeners appreciate the mix of humor and technical insights, making it engaging for both professionals and casual listeners.
Hosts are entertaining and make complex topics in forensic science easy to understand.
Content is praised for being relevant and informative, especially for those working in forensics.
The podcast is recognized for providing essential information that helps professionals stay updated in their field.

Chart Rankings

How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.

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Talking Points

Recent interactions between the hosts and their guests.

Episode 288 - Close Non-matches
Q: What is the highest number of matching minutiae between a latent mark and a temperate finger that was not actually a match that has been encountered?
Host Glenn Langenburg mentions that through his own experience, he has seen cases with up to 15 matching minutiae between latent prints that were actually non-matching.
Episode 277 - Sarah Chu Interview
Q: Can you talk a little bit about your background and how you got involved in the Human Factors Report group and in the Innocence Project?
I was hired at the Innocence Project in the fall of 2008 to do their forensic science policy work in response to the NAS report.
Episode 277 - Sarah Chu Interview
Q: What are your views on the science of fingerprints?
I've been so impressed by how the fingerprint community has worked together to inform and solidify the foundations of latent print examination.
Episode 260 - Tales from the Courtroom
Q: Do you recognize this document?
No, I don't.
Episode 262 - Teneil Hannah Interview
Q: What are the differences in focus between researchers and practitioners in fingerprint analysis?
Researchers often focus on image quality parameters like contrast and background development, whereas practitioners prioritize ridge detail and whether a mark is suitable for comparison.

Audience Metrics

Listeners, social reach, demographics and more for this podcast.

Listeners per Episode
Gender Skew
Location
Interests
Professions
Age Range
Household Income
Social Media Reach

Frequently Asked Questions About Double Loop Podcast

What is Double Loop Podcast about and what kind of topics does it cover?

Focus extensively on topics related to forensic science, especially latent print analysis, the show features lively discussions between hosts Eric Ray and Glenn Langenburg. Episodes cover a range of subjects such as recent advancements in forensic techniques, insights from various forensic professionals, and interpretations of significant legal cases involving forensic evidence. Unique to the show is the blend of entertainment and education, bringing in humor and anecdotes while tackling complex scientific issues, making it suitable for both professionals in the field and enthusiasts alike.

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To see how many followers or subscribers Double Loop Podcast has on Spotify and other platforms such as Castbox and Podcast Addict, simply upgrade your account. You'll also find viewership figures for their YouTube channel if they have one.

How many episodes of Double Loop Podcast are there?

Double Loop Podcast launched 12 years ago and published 155 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on Double Loop Podcast?

Recent guests on Double Loop Podcast include:

1. Aoife Power
2. Kim Connick
3. Craig Mullen
4. Columb Doherty
5. Michael Whyte
6. Brendan Max
7. Ruby O'Connor
8. Dr. Sarah Chu

To view more recent guests and their details, simply upgrade your Rephonic account. You'll also get access to a typical guest profile to help you decide if the show is worth pitching.

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