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                            Events
 Probabilistic Genotyping of Evidentiary DNA Typing Results - Module 5: Representation of Statistical Weight to Stakeholders and the Court Event Dates
              July 12, 2019, 12:00 pm
 – 4:00 pm
Event Duration
              4 hours
Location
              Online

Register

Forensic DNA experts in the U.S. generally have experience in communicating evidentiary weight based on binary interpretation approaches and match probabilities. Since their usage in testimony dates to the 1980s, many attorneys and judges are accustomed to the presentation of DNA evidence on these terms. This module is one of two in the Probabilistic Genotyping of Evidentiary DNA Typing Results web series that is focused on helping DNA analysts, law enforcement officers, and legal professionals understand degrees of statistical weight and communicate likelihood ratios properly. Speakers will discuss different ways in which the results of probabilistic genotyping can be accurately communicated in discussions with non-scientists, laboratory reports, and testimony, with the ultimate goal of promoting understanding of meaning, accuracy, and consistency in the expression of results. The SWGDAM recommendations for reporting likelihood ratios will be detailed, along with an explanation of the empirical basis for the SWGDAM verbal scale that may be used to supplement the likelihood ratio in laboratory reports and testimony. Particular attention will be given to fallacious reasoning and the misrepresentation of the likelihood ratio.

**Instructors:**

David Kaye – Penn State University School of Law, University Park, Pennsylvania
Tamyra Moretti – Federal Bureau of Investigation, Quantico, Virginia
Steven Myers – California Department of Justice, Richmond, California

**Detailed Learning Objectives:**

• Properly articulate likelihood ratio statements
• Describe the likelihood ratio and its meaning in a way that is understandable to laypersons
• Convey levels of statistical support based on empirical data
• Recognize phrasing of questions asked of the expert witness that could potentially lead to a misrepresentation of the LR (e.g., prosecution fallacy, defense fallacy)
View Full Course Page
  
  
          Details
Event Type
              Webinar
    Event Option(s)
          Online,
                        On demand

Sponsor(s) / Host(s)

National Institute of Justice (NIJ), U.S. Department of Justice
    Contact
          NIJ Forensic Technology Center of Excellence

  Link
              If you have questions about this course, contact the FTCoE.

  Registration Status
              Open

  Eligibility
              Free and open to all.
    
  
Read more about
    
            DNA (Deoxyribonucleic Acid)
        Law degrees
        DNA typing
        Probabilistic genotyping
        Expert Witnesses
        Forensic sciences
        Legal professionals
        Law schools
        Law enforcement
        University of Pennsylvania
        Federal Bureau of Investigation (FBI)
        Statistics
        Courts
        Judges
        Forensic Technology Center of Excellence
  
Date Created: September 23, 2019
    
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