• Home
  • ICYMI Webinar#2 - Reducing Erroneous Exclusions

ICYMI Webinar#2 - Reducing Erroneous Exclusions

  • 31 Mar 2016
  • 1:00 PM - 3:00 PM
  • Webinar


  • For our EU IAI members to access past webinar recording at a nominal fee. All fees will help fund our next conference. Thank you for your support.

Registration is closed

Many of you have requested to watch the recording of our previous webinars on-demand.

If you are EU IAI members, you can now register to get the link to view the webinar recording. Please note that a certificate will not be provided. 


Reducing Erroneous Exclusions

by Eric Ray, CLPE - Criminalist, Arizona Department of Public Safety Crime Laboratory


Penny J. Dechant, CLPE - Criminalist / Latent Print Technical Lead, Arizona Department of Public Safety Crime Laboratory

The exclusion decision is a fairly recent change in latent print comparisons, and the discipline is still struggling with how to handle exclusions. Erroneous exclusions are being discovered with surprising frequency in latent print units around the globe. Many labs have begun to verify their exclusion decisions, and this has resulted in errors finally being noticed. Recent research into the decisions of latent print examiners shows that erroneous exclusions are common and inevitable.


So, what training have you had in exclusions? What is enough for an exclusion? What is your lab's standard for exclusion? Is your lab implementing any new Quality Assurance policies to address this problem?


This webinar will review the policy changes that Arizona DPS has implemented in their latent print unit to reduce erroneous exclusions. Examples of erroneous exclusions from casework will be presented along with information on circumstances that might make an erroneous exclusion more likely.

Dechant, Penny - has been employed as a Criminalist with the Arizona Department of Public Safety, assigned to the Latent Print Unit, since 2004. She earned a BS in Chemistry from Northern Arizona University in 1995. Penny worked as a Crime Scene Specialist for the Scottsdale Police Department from 2000 to 2004. Penny is a member of the IAI and is a CLPE. Currently, Penny is the Technical Lead for the Latent Print Unit at AZDPS and serves as the President for the Arizona Identification Council.   


Ray, Eric - has been employed as a Criminalist with the Arizona Department of Public Safety in the Latent Print Unit since 2007 and is a Certified Latent Print Examiner. He earned a BS in Biochemistry and Molecular & Cellular Biology from the University of Arizona in 2000. As a member of the IAI, Eric is on the Editorial Board of the JFI and chairs the Special Committee on Latent Print Probability Modeling. He is also the Treasurer and Webmaster for the Arizona Identification Council. With Penny Dechant, Eric has published and presented extensively on Reducing Erroneous Exclusions. In his spare time he also co-hosts the Double Loop Podcast, a weekly show on fingerprint topics. Recently, Eric was named as a member of the OSAC Friction Ridge Subcommittee.


For more information on Eric and Penny's training programme, please visit: http://rayforensics.com/latent-print-training/ 

The European Division of the International Association for Identification

Laan van Ypenburg 6

2497 GB, Den Haag

The Netherlands

Email: treasurer@theiaieu.org

Powered by Wild Apricot Membership Software