Lydia McCoy

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McCoy DNA Consulting was begun by Lydia McCoy to assist the community of law enforcement officials and area attorneys in better understanding forensic DNA. She got her BS in Biochemistry at St. Mary’s University in San Antonio, Texas, and her MS in Molecular Medicine at the University of Texas Health Science Center in San Antonio, Texas. She then went on to work for over four years at the Louisiana State Police Crime Laboratory in Baton Rouge, Louisiana. It was at the crime lab that she harnessed her years of schooling into a forensic application. She attended a 17-week intensive training for forensic DNA at the NorthEast Forensic Science Institute in Albany, New York (a part of the State University of New York). During her tenure at the crime lab she was exposed to a variety of crimes encompassing a vast array of evidence samples. She learned how to best sample that evidence to yield the best possible DNA profile. She also learned how to interpret profiles and review cases. She can be reached at

Stories from Lydia McCoy

A Thorn in the Side of Forensic DNA: Complex Mixtures
Thursday, January 26th, 2017

The consultants are discussing your case. They are vigorously proclaiming how the case falls short, and you are feeling like a sure win is in the bag. Then you ask them how should we go at them in trial. It’s then that you hear things in a deflated tone like, “Well, what they did isn’t wrong, just not how I would have done it.” What happened to the fervor?