An Oregon mother whose July disappearance sparked a nationwide search killed herself in a remote area likely close to the time she was reported missing, police said Wednesday.

The Newberg-Dundee Police Department said in a news release a medical examiner has ruled the death of Jennifer Huston, whose body was found Tuesday, as a suicide. The cause of death was asphyxiation, but authorities gave no other details.

The 38-year-old mother of two was last seen July 24, when she said she was leaving home to run errands. She never returned. Her body was found Tuesday near her vehicle on a remote property in Sheridan, Oregon, after the property’s owner spotted the SUV and called authorities.

Police said an empty box of sleeping pills was found at the scene. Huston’s cell phone, purse and other personal effects were found inside the vehicle, as well as a note addressed to her family.

Huston’s body was found approximately 40 yards from her SUV, and she was wearing the clothes she had on when she vanished.

Huston’s parents, Bill and Deborah Turner, released a statement Wednesday saying “our hearts ache today.”

“We have lost our first born child,” the statement said. “We have lost a wife and a mother. We don't know what lead Jennifer to this dark place and to this end and perhaps never will understand this.”

The Turners said they “also appreciate all the efforts of the Newberg-Dundee Police Department with support from other law enforcement agencies, on our behalf to find Jennifer.”