Quebec Cold Case Murder Suspect ID’d With Help of DNA Research Tool, Trial Hears

Published on January 30, 2024

A forensic biologist has told a trial that a DNA research tool helped police hone in on the suspect who is now charged with the sexual assault and murder of a junior college student nearly 24 years ago. Valérie Clermont-Beaudoin testified on Jan. 30 at the Saguenay, Que., jury trial of Marc-André Grenon, who is charged with the first-degree murder, and aggravated sexual assault, of Guylaine Potvin in April 2000. Ms. Clermont-Beaudoin said the unidentified male DNA collected at the crime scene was run through a database called “projet patronyme,” which analyzes the Y chromosomes of DNA samples and suggests surnames that could be associated with them....