Rephonic
Artwork for Double Loop Podcast
Forensic Science
Fingerprint Analysis
Latent Print Examination
Pat Wertheim
Kasey Wertheim
Texas Forensic Science Commission
Fingerprints
Latent Print Identification
Fingerprint Examination
Close Non-Matches
DNA Evidence
Josephine Herbert
Forensic Standards
Phalange Patterns
IAFS Conference
Research Methodology
Ridge Flow Analysis
Latent Prints
NIST
Black Box Study

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.

PublishesMonthlyEpisodes160Founded13 years ago
Number of ListenersCategories
GovernmentNatural SciencesScience

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Artwork for Double Loop Podcast

Latest Episodes

In this episode, the guys start off with Regional Quirkisms from the Land Down Undah. They then interview Cindy Cale, DNA expert from DNA Mavens, a consulting and training company in Houston, TX. Cindy will discuss 3 topics, all related to testimony ... more

Eric and Glenn finish this two-parter episode about ASB Standards and Best Practice Recommendations. Specifically, in Part 2, they cover ASB Standard 015 "Standard for Examining Friction Ridge Impressions" (2024) and ASB Best Practice Recommendation ... more

Eric and Glenn start off this supersized two-parter topic with a Regional Quirkisms game of Canadian-isms. Then they move past the Great White North and talk about ASB Standards and Best Practice Recommendations. Specifically, they cover ASB Standard... more

Eric and Glenn start the episode with a listener email and then play a numbers themed game of Regional Quirkisms. For the topic of this episode, the guys discuss a 2025 paper from Simon Cole and Justin Sola titled "First impressions matter: Mundane o... more

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Recent Guests

Cindy Cale
DNA Mavens founder and consultant
DNA Mavens
Episode: Episode 294: Cindy Cale Interview and DNA Activity Level
Angela Tonietto
Forensic scientist and PhD student focused on palm prints
Sam Houston State University
Episode: Episode 289 - Angela Tonietto Interview - Palm Patterns
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

Hosts

Glenn Langenburg
Co-host of the show; forensic scientist discussed in intro; host of the podcast; affiliated with Elite Forensic Services in some instances.
Eric Ray
Co-host of the show; forensic scientist discussed in intro; co-host of the Double Loop Podcast.

Reviews

4.7 out of 5 stars from 130 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 🇨🇦
    Canada3 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

Listeners Say

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

Interviews with guests add depth and practical context for examiners.
Training-style discussions help professionals stay up-to-date.
Technical debates are balanced with accessible explanations.
Hosts blend humor with forensic rigor, making dense topics approachable.
Shows influence CPD and professional learning in forensics.

Chart Rankings

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

Talking Points

Recent interactions between the hosts and their guests.

Episode 294: Cindy Cale Interview and DNA Activity Level
Q: What does the panel say about the shift away from traditional serology toward DNA testing in sexual assault cases?
They note that labs increasingly rely on DNA and interpretive software, sometimes bypassing traditional serology, which raises concerns about understanding transfer mechanisms and ensuring adequate training for activity-level testimony.
Episode 294: Cindy Cale Interview and DNA Activity Level
Q: Could you explain why the DNA analyst in the article refused to answer questions about activity-level transfer when the defense asked if saliva or ejaculate could have contributed to the sample?
The analyst stated that her testimony should be limited to the lab results and the DNA evidence, not to hypothesize how the DNA got there or what happened before collection, which is a matter of activity-level interpretation and should be supported by appropriate data and disclosures.
Episode 289 - Angela Tonietto Interview - Palm Patterns
Q: Angela, what are next steps? Where are you in your educational process?
Angela is working towards her PhD at Sam Houston State University and is involved in multiple research projects related to palm prints, aiming for graduation in May 2028.
Episode 289 - Angela Tonietto Interview - Palm Patterns
Q: Angela, do you foresee that an easy way to digest this information?
Angela discusses the need for a practical application of her study's findings in forensic casework and how this could be facilitated through automated systems or databases.
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.

Audience Metrics

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

Listeners per Episode
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Frequently Asked Questions About Double Loop Podcast

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

A weekly deep-dive into latent print examination, forensic science research, and current events from two seasoned forensic scientists. The show blends technical analysis of papers and casework with guest interviews and discussions of policy, regulation, and courtroom challenges. Listeners likely include practicing examiners, students, and professionals who want clear, practical takes on methodology, technology, and how research translates to real cases. Noteworthy is the long-running duo's ability to translate dense research into accessible lessons, plus frequent guest experts and candid industry debates that appeal to both practitioners and policy-minded audiences.

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How many listeners does Double Loop Podcast get?

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How many subscribers and views does Double Loop Podcast have?

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Which podcasts are similar to Double Loop Podcast?

These podcasts share a similar audience with Double Loop Podcast:

1. This American Life
2. Criminal
3. Crime Junkie
4. Ologies with Alie Ward
5. Huberman Lab

How many episodes of Double Loop Podcast are there?

Double Loop Podcast launched 13 years ago and published 160 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

How do I contact Double Loop Podcast?

Our systems regularly scour the web to find email addresses and social media links for this podcast. We scanned the web and collated all of the contact information that we could find in our podcast database. But in the unlikely event that you can't find what you're looking for, our concierge service lets you request our research team to source better contacts for you.

Where can I see ratings and reviews for Double Loop Podcast?

Rephonic pulls ratings and reviews for Double Loop Podcast from multiple sources, including Spotify, Apple Podcasts, Castbox, and Podcast Addict.

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What guests have appeared on Double Loop Podcast?

Recent guests on Double Loop Podcast include:

1. Cindy Cale
2. Angela Tonietto
3. Aoife Power
4. Kim Connick
5. Craig Mullen
6. Columb Doherty
7. Michael Whyte
8. Brendan Max

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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