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Eleven murders and disappearances that occurred in the territory are still under investigation at the SQ –


Eight cases of murders committed in what is today the territory of the agglomeration of Longueuil as well as one case of disappearance are among the unsolved cases presented on the Sûreté du Québec website.

There is obviously the file of Diane Déry and Mario Corbeil, which was recently the subject of the investigative documentary series The last night, in which journalist Monic Néron attempted to shed new light on one of Quebec’s only unsolved double murders of teenagers.

cold cases 1 BREAD ALSO: Advancing unresolved issues on television

Left for a motorcycle ride in a field near boul. Roland-Therrien, in Longueuil, on the evening of May 20, 1975, Diane Déry, 13, and Mario Corbeil, 15, never returned. Their bodies were discovered by the police the next day, in a wooded area at the end of boul. Roland-Therrien.

File number: 103-790926-003.

Chantal De Montgaillard

cold cases 2Left unattended for a few moments with her brother in a motor vehicle in the parking lot of Paul-Chagnon school, in Saint-Hubert, on June 4, 1972, Chantal De Montgaillard, 4 ½ years old, is no longer in the car on the way back from his father. The searches carried out did not allow to find it.

In July 2019, new information prompted the SQ’s Disappearances and Unresolved Cases Division to relaunch the case. Michel Déry, notably convicted of the murder of a 5-year-old girl in Drummonville, in 1983, would have revealed during an interrogation that he had abducted a little girl of four years old when he was a teenager.

File number: 080-720605-001.

Ursula schulze

cold cases 3At around 7.15 am on July 13, 1972, Ursula Schulze was waiting for the bus near 8445, boul. Marie-Victorin, in Brossard, when a driver got out of a burgundy or brown Buick Skylark or Toyota vehicle grabs her by the arm and makes her get into his car.

The next day, around 3:45 p.m., the body of the victim, struck by projectiles from firearms, was found by a passer-by at the back of a former soap warehouse, on rang Saint-Claude, in Saint-Philippe- de-La Prairie.

File number: 101-720714-001.

Wilton Lubin

cold cases 4Wilton Lubin, 12, left the family home on rue Desjardins, in the Hochelaga-Maisonneuve neighborhood, in Montreal, around 5 p.m. on November 1, 1984, to go to a DIY class not far from home, before taking the evening with his friend Sébastien Métivier, 8 years old. The two boys never returned.

On December 2, 1984, Wilton Lubin’s body was found on the shores of Île Charron. Sébastien Métivier has still not been located (file under the responsibility of the Police Department of the City of Montreal – # 52-841101-045).

File number: 103-841203-003.

Annette Labelle

cold cases 5The body of Annette Labelle was found by an employee of the Ministère des Transports, along Highway 30 West, in Saint-Hubert, on June 25, 1986. Her personal effects were found by passers-by at the intersection of highways 10 and 30.

The 30-year-old was last seen alive 6 days earlier, on the evening of June 19, 1986, at Café Rialto, in Montreal.

File number: 103-860625-007.

Johanne Marsolais

cold cases 6On the evening of December 18, 1987, 28-year-old Johanne Marsolais, who uses the alias France Tremblay, was last seen alive around 10:30 p.m., at the Le Bic bar in Longueuil, after taking a taxi from the Berri metro station in Montreal.

His body was found on a farmer’s path perpendicular to boul. Lapinière, near the municipal golf course, in Brossard.

File number: 101-871120-001.

Étienne Séguin and Régine St-Pierre

cold cases 7 Acold cases 7 BLate in the evening of May 7, 1989, Étienne Séguin, a businessman working in the auction sector, and his wife Régine St-Pierre were murdered in their residence on Chemin de la Savane, in Saint-Hubert. According to the investigation, the motive for this double murder would have been theft.

File number: 103-890509-006.

Kevin dubois

cold cases 8Around 11:45 p.m. on July 31, 1989, Kevin Dubois left his home on rue LeMoyne Est, in Longueuil, with a friend. As they board his vehicle parked on LeMoyne Street, a suspicious vehicle approaches. Several shots were fired in the direction of the two men, fatally reaching Kevin Dubois and injuring his friend.

File number: 103-890808-007.

Lise Brisebois

cold cases 9Around 11 p.m. on March 9, 1990, Lise Brisebois joined friends at the Super 9 nightclub in Saint-Mathias-sur-Richelieu. They all leave around 3.30am, in their respective vehicles, to return to their homes. At around 4:10 am, a friend calls Lise Brisebois to make sure she has arrived at her home on rue Paquette, in Brossard. At 4:25 am, she ends the conversation, claiming that she hears noise. This is his last sign of life.

Missing on March 10, her vehicle was found three days later at Mail Champlain, in Brossard.

His body was not found until more than 8 months later, on November 17, 1990, in a wooded area on Chemin Gingras in Rainville (a municipality now merged with Farnham).

File number: 097-901117-001.

Any information that may help resolve these crimes can be communicated to the SQ’s Central Criminal Information Office at 1 800 659-4264.




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