Longueuil Police Seek Additional Victims in Sexual Assault Case

**Longueuil Police Seek Additional Victims in Sexual Assault Case**

Longueuil police are asking the public for assistance in identifying potential additional victims of a man suspected of sexual assaults that may date back over 50 years. Marc Gagnon, 69, was arrested on September 29 and is facing multiple charges related to sexual offenses that occurred between 1970 and 1990 in the St-Hubert area of Longueuil and in Montreal.

Gagnon has been charged with eight counts, including gross indecency, indecent exposure, and sexual assault. Authorities believe that there may be other incidents connected to Gagnon that span five decades, potentially occurring in Longueuil or other locations in Quebec.

In an effort to gather more information, police released photographs of Gagnon taken in 1980, 2012, and 2025. They are encouraging anyone who may have been a victim or who has relevant information to come forward.

Individuals with information are urged to contact Longueuil police at 450-463-7211. All communications will be kept confidential as the investigation continues.