LIVE: How does DNA actually solve cold cases?

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Today on Prof Jo Explains, Prof Jo is joined by Dr. Colleen Fitzpatrick, one of the world’s leading experts in forensic genetic genealogy and the Founder & President of Identifinders.

Dr. Fitzpatrick is a true pioneer in the field. Long before genetic genealogy became mainstream, she helped develop the techniques now used to crack some of the most difficult cold cases in history—including cases solved before the Golden State Killer identification brought global attention to the science.

In this live conversation, we break down:

How forensic genetic genealogy actually works

The difference between traditional DNA testing and SNP genealogy

Using compromised or decades-old DNA evidence

Where DNA evidence is powerful—and where it can mislead

Ethical, legal, and investigative boundaries law enforcement must navigate

Dr. Fitzpatrick is also a former Co-Founder and Co-Executive Director of the DNA Doe Project, where she helped solve landmark cases including Joseph Newton Chandler III and the Buckskin Girl—weeks before similar methods identified the Golden State Killer.

With experience on hundreds of cold cases, collaborations with agencies worldwide, and a background that spans nuclear physics, NASA research, and forensic science, Dr. Fitzpatrick brings unmatched clarity to one of the most misunderstood areas of modern criminal investigations.

📌 Join us live, ask your questions in real time, and get a no-nonsense breakdown of DNA evidence from someone who helped build the field.

Disclaimer: The legal analysis and commentary provided in this program are for information and educational purposes only. The opinions expressed by the host and participants are not legal advice, nor are they intended to guide or influence any viewer’s legal decisions, strategies, or actions. Laws vary by jurisdiction, and the facts of every case are unique; past legal outcomes do not guarantee similar results in future cases.

Before acting on any legal topic discussed on Prof Jo Explains, evaluate its relevance to your specific circumstances and consider consulting a licensed attorney in your jurisdiction. The criminal cases, trials, and investigations discussed on this program may involve allegations, evolving information, and matters of public record. All individuals are presumed innocent until proven guilty in a court of law.

The discussions on this program may include descriptions of violent crimes, legal disputes, and sensitive subject matter that may not be appropriate for all listeners. Listener discretion is advised.

Nothing in this communication is a recommendation to pursue or avoid any legal action, nor is it an offer of legal services. The host and production team make no guarantees regarding the accuracy, completeness, or timeliness of the information presented and assume no liability for any actions taken or not taken based on this content.