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                            Events
 Stability and Persistence of Touch DNA for Forensic Analysis Event Dates
              March 11, 2021, 1:00 pm
 – 2:00 pmEastern
Event Duration
              1 hour
Location
              Online

Register

Touch DNA evidence (i.e. the low quantities of DNA that can be left behind when someone touches an object) is of increasing importance in criminal investigations. However, many important questions exist regarding basic properties of touch DNA, including the expected stability of touch DNA samples following exposure to different environmental conditions.

The webinar will review existing scientific literature, describe lessons-learned and best practices for conducting experiments with touch DNA, and describe the initial results of a study designed to evaluate the stability of touch DNA under different environmental conditions. Five controlled environmental conditions were established with highly controlled temperature, relative humidity, and ultraviolet light levels. A formal randomization scheme was implemented to minimize sources of potential variability. The stability of both control DNA and touch DNA samples collected from donors was evaluated. DNA was collected and purified at different time points, quantified using the Quantifiler HP kit, and evaluated for the ability to yield a full short-tandem repeat profile. The data were used to fit predictive models of DNA concentration given time and environmental condition. Collectively, these studies meet a critical need to provide comprehensive, well-controlled data and predictive models regarding the stability of touch DNA in real-world scenarios.
View Event 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;Forensic Technology Center of Excellence
    Contact
          NIJ Forensic Technology Center of Excellence

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

  Registration Dates
              February 17, 2021 - March 11, 2021

  Registration Status
              Open

  Eligibility
              Free and open to all.

  Credits
              Certificate of completion
    
  
Read more about
    
            Literature Reviews
        DNA (Deoxyribonucleic Acid)
        Criminal investigation
        Best practices
        Forensic sciences
        Trace DNA
        Evidence analysis
        Evidence analysis and processing
        Forensic Technology Center of Excellence
  
Date Created: February 17, 2021
    
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