The Science Behind the Stories: Using Genetic Genealogy in Crime Fiction

Nathan Dylan Goodwin
Apr 4, 2025
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Content

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Welcome
53s
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Introduction
14s
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What is IGG?
10m 53s
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Databases
4m 52s
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Venator Cold Case Series
6m 24s
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Simplified Overview
21m 56s
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Noteworthy Cases
4m 58s
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Announcements / prizes
1m 53s
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Questions / answers
4m 44s

About this webinar

This talk gives an overview of the investigative genetic genealogy process: what it is, where it is used and the basics of how it is undertaken. Nathan briefly discusses some real-life key cases that have used IGG and then moves on to his own fictional writing, focussing on the Venator Cold Case series, which uses this methodology to catch serial killers. He explains his meticulous research process, the experts that he consults and his process of writing.

About the speaker

About the speaker

Nathan Dylan Goodwin is a writer, genealogist and educator. He was born and raised in Hastings, East Sussex. Having attended school in the town, he then completed a Bachelor of Arts degree in Radio, Film and Television Studies, followed by a Maste
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Key points and insights

In a captivating conclusion to the 24-hour genealogy webinar marathon, genealogist and crime fiction author Nathan Dylan Goodwin delivered a riveting presentation titled The Science Behind the Stories: Using Genetic Genealogy in Crime Fiction. Blending real-world science with fictional storytelling, Goodwin explored the evolving field of investigative genetic genealogy (IGG) and its growing role in solving cold cases, identifying unknown individuals, and informing his popular crime novels. His deep dive into both the science and ethics behind IGG provided attendees with a thorough, accessible, and thought-provoking look at a cutting-edge genealogical tool that’s transforming forensic investigations around the world.

Key Takeaways:

  • IGG Defined and Differentiated: Investigative Genetic Genealogy (IGG) uses consumer DNA data and traditional genealogical methods to help law enforcement identify criminal suspects or unknown human remains. While acronyms vary (IGG, FIGG, FGG), the core practice involves leveraging autosomal DNA testing, triangulating DNA matches, and reconstructing family trees. Goodwin distinguished IGG from standard forensic techniques like STR-based familial searches, highlighting its superior range and effectiveness, particularly in the U.S. and Australia.
  • Ethical and Legal Complexities: The webinar delved into the legal landscapes shaping IGG’s use across different countries. While the U.S. leads with over 1,000 cases, many European nations are only cautiously beginning to adopt the method due to privacy regulations like GDPR and Article 8 of the European Court of Human Rights. Goodwin also addressed public concerns around data privacy and law enforcement’s controversial use of consumer databases, emphasizing the importance of informed consent and opt-in policies.
  • From Fiction to Forensics: Drawing from his Venator Cold Case series, Goodwin illustrated how IGG principles are woven into compelling narratives. His fictional investigations mirror real-life techniques—such as segment triangulation, background research, and reverse genealogy—demonstrating how IGG can identify suspects even in the absence of direct DNA matches. He also underscored how geo-profiling, phenotype prediction, and social media analysis are powerful complementary tools in narrowing suspect pools.

To experience the full depth of this compelling session, viewers are encouraged to watch the complete webinar. Whether you’re a genealogist, true crime enthusiast, or aspiring writer, Goodwin’s insights offer a unique blend of science, storytelling, and investigative intrigue.

Finally, don’t miss the valuable resources provided in the accompanying syllabus. These include links to DNA analysis tools, background check services, and examples of real-life cases—all designed to enhance your understanding and application of genetic genealogy. Dive deeper into the evolving world of IGG and explore how your DNA knowledge might help solve mysteries both real and imagined.

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  1. JP
    Jan Pennington
    1 day ago

    I have enjoyed all Nathan ‘s books, and his talk today did not disappoint. It was interesting to hear how IGG has been used in different countries. The Marathon was well worth attending. I am afraid I only watched the last 12 – I look forward to watching the rest when they are when they are put on line. The range of topics kept my interest. They weren’t all related to building a bigger family -signature quilts, early history of Germany, and how DNA is used to solve crimes all added to the day.

    Reply
  2. CL
    Clara Lawver
    1 day ago

    I didn’t think it would be interesting — but his presentation drew me in — just like any good mystery! Thank you Mr. Goodwin.

    Reply
  3. DM
    Danny Morrison
    1 day ago

    The presentation was exceptionally well-delivered—-both engaging and informative. Explained complex genetic concepts in a way that was accessible while still offering depth for more advanced genealogists.

    Reply
  4. MJ
    Mary Jane Baxley
    1 day ago

    Excellent explanation of the way law enforcement utilizes DNA in the identification process. I enjoy Nathan’s books also!

    Reply
  5. SF
    Sharron Fry
    1 day ago

    I love Nathans approach to explaining how DNA mysteries are solved. I have read all 3 of the Venator Series Books and others and can’t wait for the next one, and the solving of Maddy’s husbands murder. The books gave me a lot of clarity about the process of clustering and reverse genealogy in solving DNA mysteries and have helped me help others to solve their life long paternity issues.

    Reply
  6. JT
    Jean Tempke
    2 days ago

    Great oveview of the science and process of IGG. Really enjoyed listening to Nathan. Thank you to Legacy, Geoff, Marian & others for the very informative marathon. There are several sessions I couldn’t stay awake to hear but will watch the recordings. Very happy to have a webinar subscription – a real bargain!

    Reply
  7. RT
    Risela Tyma
    2 days ago

    WOW!!! I think I’m in brain overload after this Marathon! LOL!!! Enjoyed Nathan’s presentation immensely and can’t wait to read his books! Looking forward to rewatching the marathon presentations and watching the ones I couldn’t stay awake for! LOL!

    Reply
  8. LK
    Lori Kotlowski
    2 days ago

    Great presentation, truly enjoyed the behind the scenes explanation of what is involved in the process of IGG. This webinar was insightful, educational, captivating and enjoyable.

    Reply

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