Police found the body of 17-year-old Véronique Huard at an apartment complex outside of town after responding to a call about a disturbance.
Neighbours had called around 3 a.m. Tuesday, complaining of loud fighting.
The accused, 21-year-old Jason Theriault, was denied bail because of a series of past crimes.
Huard and Theriault had apparently been living there together for about a week.
Theriault’s next court appearance is scheduled for Oct. 23.