A Surete du Quebec helicopter was called in Sunday to boost the search efforts for missing Piedmont woman Natasha Cournoyer.

Cournoyer, 37, was last spotted Thursday at 8 p.m., when she was filmed on surveillance cameras leaving the office tower at Place Laval at St. Martin and Industriel Blvds in Laval. No one has seen or heard from her since.

"I tried to call her all evening long, also through the night, also Friday morning and I never got an answer," said her boyfriend Michel Trottier.

After checking Cournoyer's home in Piedmont and checking with her mother, Trottier went to her office, where he discovered her car. That's when he called police.

"We don't know what's going on she is a very normal girl - no enemies, no people who didn't like her," said Trottier, who organized a group of about 30 people to put up posters in the area where she went missing.

Dozens of police officers have used search dogs to comb a wooded area behind the parking lot of her workplace for clues and have investigated the area near where her car was found.

There were no signs of violence or a struggle around her car.

Cournoyer has worked for Correctional Service of Canada for the past four months, but police don't believe her position had anything to do with the disappearance.

"She works at the communications part so she's not in contact with any criminal person or anything like this. So right now the investigation tells us that it's not related to her job," said Laval police Sgt. Francois Dumais.

Cournoyer is five-foot-five, weighs 115 pounds, and has blond hair and blue eyes. She is Caucasian and speaks French.

Anyone with information is urged to call 9-1-1 or 450-662-INFO.