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Examining DNA evidence: TrueAllele® case studies

B. Pujols, "Examining DNA evidence: TrueAllele case studies", Legal Medicine & Forensic Science, Duquesne University Law School, Pittsburgh, PA, 19-Mar-2020.


PowerPoint presentation of Beatriz Pujols' talk.

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DNA evidence collected from a crime scene may contain information for a criminal investigation. When DNA analysis works, it could provide an important link between a suspect and the evidence. However, human DNA interpretation is limited by commonly encountered factors such as mixtures. Technology allows a human analyst to collect more identification information from evidence that would be deemed inconclusive using other methods.

A crime in Allegheny County was solved using such technology, TrueAllele® Casework. The powerful technology connected a bloodstain from a cashbox to a suspect in a homicide. In another case from West Virginia, TrueAllele excluded a defendant from sexual assault evidence. This talk describes how the computer arrived at its conclusions, and the impact of the results at trial. Direct and cross-examination is discussed, as well as the importance of validation as a basis for any scientific method used in a courtroom.

Cybergenetics TrueAllele® analyst Beatriz Pujols lectured about DNA evidence in Dr. Cyril Wecht’s “Legal Medicine and Forensic Science” course at Duquesne University School of Law.
(Photograph courtesy of Cyril H. Wecht, MD, JD)