Double Loop Podcast

Glenn Langenburg, Eric Ray

Booking Overview

This is a forensic-science interview and analysis show focused on latent prints, fingerprint research, standards, and related evidence disciplines, with occasional interviews of practicing experts. Credible pitches include forensic scientists, latent-print examiners, DNA experts, researchers, and professionals involved in forensic standards or courtroom evidence; booking difficulty is likely low because the show features specialized, accessible practitioners rather than highly prominent public figures.

Metrics

Episodes: 161

Frequency: Monthly

Rating: 4.7/5.0

Estimated listeners: 1,000 - 10,000

Listener location: USA

YouTube: 2.3k subscribers

Instagram: 581 followers

Contact Information

Publicly listed emails

eric@rayforensics.com

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Host

Glenn Langenburg - Forensic scientist specializing in latent prints and fingerprint evidence.

Eric Ray - Forensic scientist specializing in latent prints and broader forensic-science topics.

Booking Intelligence

Booking Requirements

low

Typical Credentials:

Practicing forensic scientists, latent-print examiners, DNA experts, forensic researchers, and professionals with experience in forensic standards, validation, or courtroom testimony.

Required Achievements:

Specialized expertise in forensic evidence analysis, Research or publications in forensic science, Experience providing expert testimony, Involvement in forensic standards or professional training

Recent Guest Discussions

Cindy Cale - DNA Activity-level Testimony, Validation Issues, Complex DNA Mixtures, Secondary DNA Transfer, And The Implications Of DNA Evidence For Fingerprint Examination.

Recent Topics

Science, Forensic Science, Latent Prints, Fingerprint Analysis, Dna Evidence

Episodes

Here's the recent few episodes on

Double Loop Podcast

Episode 295 - Forensics on YouTube Reaction

August 13, 2026

Recently, a YouTube science channel discussed five different forensic disciplines and explored potential issues with each. Eric Ray and Glenn Langenburg react to the video and share their perspectives as forensic scientists from valid criticisms to misunderstandings. Have we really been "Using The Wrong Science In Court For 50 years"? Watch the full original video here: https://www.youtube.com/watch?v=mvcesPWvUIc

Episode 294: Cindy Cale Interview and DNA Activity Level

July 17, 2026

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 of the activity level, with respect to DNA, as well as discuss validation issues in DNA. They first discuss a recent DNA testimony case report titled "DNA analyst's refusal to answer an activity level question did not violate the defendant's rig...

Episode 293_ASB Standards Part 2

July 03, 2026

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 166 "Best Practice Recommendation for Comparison and Evaluation of Friction Ridge Impressions" (2024). The guys discuss how to use the standards, their own experiences, some of the critical requirements and recommendations, etc. ASB Standard ...

Publicly listed emails

eric@rayforensics.com

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