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SAGUENAY — A forensic biologist has advised an ordeal {that a} DNA analysis device helped police hone in at the suspect who’s now charged with the sexual attack and homicide of a junior faculty scholar just about 24 years in the past.

Valérie Clermont-Beaudoin testified Tuesday on the Saguenay jury trial of Marc-André Grenon, who’s charged with the first-degree homicide and irritated sexual attack of Guylaine Potvin in April 2000.

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Clermont-Beaudoin mentioned the unidentified male DNA accumulated on the crime scene used to be run via a database referred to as “projet patronyme,” which analyzes the Y chromosomes of DNA samples and suggests surnames which may be related to them.

She defined that Y chromosomes are handed down from father to son, as are final names typically, which permits biologists to spot tentative last-name suits for unknown DNA.

She mentioned the male DNA accumulated underneath Potvin’s fingernails used to be entered into the database in 2022 and used to be discovered to have an overly top correspondence with the final call “Grenon,” scoring 94 issues of a conceivable 98.

She mentioned the tips used to be given to cops, who used it to focal point their investigation at the suspect and collect a brand new DNA pattern from a discarded ingesting cup and straws he had used.

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