The crash happened on Highway 158 in Mirabel last October.
Jacques Beauchemin, 51, was killed when a car carrying the two women, aged 17 and 18, hit his car head-on.
According to Sûreté du Québec Sgt. Mélanie Dumaresq, evidence collected by police demonstrates that the head-on collision was allegedly deliberate.
"They think the two girls made a suicide pact. That's why they went on the road and caused a fatal collision," Dumaresq said.
The two women were arrested this week. Driver Brenda Pelletier Bélanger, an 18-year-old from St-Colomban, has been charged with second-degree murder.
Her passenger, who was injured in the crash, was charged with involuntary manslaughter in youth court. Although she is now 18 years old, she was 17 at the time of the crash, and so her name cannot be published.
Pelletier-Belanger will remain in custody until her next court appearance on Sept. 14.