Investigators have set up a command post in Mascouche related to the deaths of Martin Bélair, a 37-year-old from l’Épiphanie and Nancy Beaulieu, a 41-year-old from Granby.
Police want information about Bélair's vehicle, a white GMC Sierra pickup truck with the license number K79FJM.
They say the vehicle was in the Granby area at around 9 p.m. on Jan. 6.
It was found by police three days later, on Jan. 9 in Mascouche, on Avenue de la Gare, with the bodies of Bélair and Beaulieu covered in snow in the back of the truck.
Investigators are hoping to determine the whereabouts of the vehicle between those two dates.
Anyone with information is asked to call 1-800-659-4264 or visit the command post at 760 Avenue de la Gare in Mascouche.