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Investigative Genetic Genealogy:

What Genealogists Need to Understand

Investigative Genetic Genealogy (IGG) is not simply “using DNA to solve crimes.”

It is a specialized, highly structured application of genetic genealogy — one that operates at the intersection of science, law, ethics, and traditional genealogical research. Most genealogists hear about IGG through headlines. Few understand the methodology, limitations, or professional responsibilities involved.

Investigative Genetic Genealogy (IGG) has transformed cold case investigations and unidentified human remains identification, bringing long-awaited answers to families and communities. Yet the discipline differs significantly from recreational DNA testing and traditional family history research.

This presentation provides a clear, practical overview of how IGG works, how it differs from hobbyist genealogy, what ethical and legal considerations shape its practice, and what genealogists should understand about its growing role in the field. Attendees will leave with a grounded understanding of methodology, guardrails, and the future direction of this evolving specialty.

Suzanne Harmon is a genealogist specializing in U.S. research and genetic genealogy. With a passion for uncovering the past, she helps clients find their ancestors, break through long-standing brick walls in their family trees, solve family mysteries, and verify—or debunk—long-held family stories.

Her expertise extends to attributing parentage in adoption and unknown parentage cases through the strategic use of DNA analysis, traditional genealogical research methods, and a deep understanding of historical records and social context.

Whether clients are seeking answers about their family origins or need help with complex DNA cases, she offers thoughtful, evidence-based solutions to illuminate each family’s unique story.