Episode 162 – Vos PCAST Article

Vos PCAST Article

Vos PCAST Article

Eric Ray and Glenn Langenburg discuss last year’s article, Using the PCAST Report to Exclude, Limit, or Minimize Experts by Eric Alexander Vos published in Criminal Justice. We note the extreme bias of the article to exploit the emotions of the judge and jury instead of logic, reason, or data, and we find the serious flaws in many aspects of the paper.

Double Loop Podcast with Glenn Langenburg and Eric Ray
Podcast for Latent Print Examiners
Your source for everything about fingerprints
While you’re working on your comparisons, we’ll talk about comparisons

Episode 149 – White Box Exclusion Article

White Box Exclusion Article

White Box Exclusion Article

Eric Ray and Glenn Langenburg delve deep into the data from the White Box and Black Box studies regarding the exclusion decision (Factors associated with latent fingerprint exclusion determinations). Ulery, Hicklin, Roberts, and Buscaglia publish this data revealing a strong correlation between exclusion accuracy and the presence of a core or delta in both impressions. Glenn and Eric also look at how minutiae count and latent quality affect exclusion accuracy and then discuss the utility of the decision itself. Interesting stuff.

“These are all great numbers. How do you translate this into a system that the examiner can use during comparison that will help decrease errors, improve consistency between different examiner’s about the conclusion that they reach, and provide a basis for comparison that’s easily convertible into some sort of policy you can write down? You can have a somewhat straightforward rule that that can be implemented and improve all these things.

This is why I strongly believe that if with exclusion that it’s hard to look at these different things. So you find the thing in both prints that’s the same (the delta or the core). If both prints have one, then that’s the same in both. Then look for clear minutiae around it that are different then you have yourself an exclusion. I think that mindset can be written down to improve consistency between examiners and it hits all these things. It hits the core, the delta, the number of minutiae, and the LQ Metric.”

Double Loop Podcast with Glenn Langenburg and Eric Ray
Podcast for Latent Print Examiners
Your source for everything about fingerprints
While you’re working on your comparisons, we’ll talk about comparisons

Episode 148 – FBI’s New Approach

FBI's New Approach

FBI’s New Approach

Glenn Langenburg and Eric Ray share exciting and groundbreaking news! The FBI latent print unit has officially moved beyond Approach 1. Their examiners may now utilize the inconclusive decision even when better exemplars are not needed. Hopefully, many other Approach 1 agencies start looking to adapt their procedures and move in this same direction.

Double Loop Podcast with Glenn Langenburg and Eric Ray
Podcast for Latent Print Examiners
Your source for everything about fingerprints
While you’re working on your comparisons, we’ll talk about comparisons

Episode 143 – 2017 IAI Position Statement

2017 IAI Position Statement

2017 IAI Position Statement

Eric Ray and Glenn Langenburg work their way through the newest position statement from the International Association for Identification. Does it allow examiners to say whatever they want? Is it too vague? Does it overstep the IAI’s role, or does it abandon the IAI’s traditional role in the discipline? All good questions that Eric and Glenn will try to answer (sort of).

Double Loop Podcast with Glenn Langenburg and Eric Ray
Podcast for Latent Print Examiners
Your source for everything about fingerprints
While you’re working on your comparisons, we’ll talk about comparisons

Episode 139 – PCAST Report

PCAST Report

PCAST Report

Eric Ray and Glenn Langenburg catch up after an extended hiatus and then review the recent PCAST report. The President’s Council of Advisors on Science and Technology issued a scathing report calling for the end of many forensic disciplines. The Double Loop Podcast responds.

Double Loop Podcast with Glenn Langenburg and Eric Ray
Podcast for Latent Print Examiners
Your source for everything about fingerprints
While you’re working on your comparisons, we’ll talk about comparisons