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Dive into the thrilling realm of investigative genetic genealogy with GSI Events' and their captivating murder mystery experiences!

For those who can attend an in-person event in London, England, we are delighted to bring you a Day of DNA with Diahan Southard and Nathan Dylan Goodwin, culminating in GSI: Superstition Mountains - London LIVE for an exclusive cold case murder mystery night, piecing together DNA clues to identify an unknown killer.

Prefer the comforts of home or can't travel to London? Unravel the enigma of a live serial killer case on-demand, at your leisure, from your own home with GSI: Sawtooth On-Demand.

And... coming soon, GSI: Superstition Mountains On-Demand....

Both experiences are guided by the unparalleled expertise of DNA guru, Diahan Southard and renowned genealogical crime author, Nathan Dylan Goodwin. Both journeys promise not just a whodunit, but a masterclass in investigative genetics. Choose your mystery and become the detective you always dreamed of!

The creators

Nathan Dylan Goodwin

Nathan is a writer, genealogist, educator and Creative Director at The Novel Guys. He has a BA degree in Radio, Film and Television Studies and an MA degree in Creative Writing at Canterbury Christ Church University. He is the author of many books, including the acclaimed Forensic Genealogist series and the Venator Cold Case series.


Diahan Southard

Diahan is a genetic genealogy expert, educator, founder and CEO of Your DNA Guide.

Diahan teaches internationally, writes for popular magazines, authored Your DNA Guide–The Book, and produces Your DNA Guide–the Academy, an online learning experience.


Testamonials from the live and virtual versions:


"The experience was totally awesome!"

LC, GSI Sawtooth attendee

"So fun and so well prepared and detailed." 

AJ, GSI Sawtooth attendee

"I loved this adventure. It was the perfect combination between entertainment and a learning experience."

JH, GSI Sawtooth attendee

"I had so much fun and and my confidence in my genetic genealogy skills has gone from zero to way up! I would recommend this to anyone, no matter what their level of skill in genetic genealogy."

CA, GSI Sawtooth attendee

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