Suspect in decades old Quebec murder and sex assault may have other victims: SQ

By The Canadian Press

Quebec provincial police say they believe a man charged this week in the murder and sexual assault of a college student 22 years ago may have had other victims.

Marc-André Grenon, 47, was charged Thursday with first-degree murder and aggravated sexual assault of Guylaine Potvin, 19, in April 2000.

He was also charged with attempted murder and sexual assault in a separate, violent sexual assault that took place in Quebec City in July 2000, in which the victim was left for dead but survived.


Guylaine Potvin

(CREDIT: Sûreté du Québec)


Police said Friday their investigation leads them to believe there are other victims, including minors, allegedly connected to Grenon.

A police unit that investigates serial offenders has been transferred to the case, and police have released photos of the suspect over the years so that other potential victims may recognize him.

His arrest is the first made by the police’s cold case squad since it was beefed up with more resources in 2018.


Marc-André Grenon, charged in 2000 death of Guylaine Potvin. (CREDIT: Sûreté du Québec)

(CREDIT: Sûreté du Québec)


Anyone with information on Grenon or believes they may have been a victim of his, can contact the SQ confidentially at 1-800 659-4264.

Grenon remains detained until his next court appearance on Nov. 21.

This report by The Canadian Press was first published Oct. 14, 2022.

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