Stacey English disappeared just days after Christmas, and it took Atlanta authorities more than a month to find the 36-year-old woman's body -- in a heavily wooded area just one mile from where police recovered her abandoned, but still running car.
The Fulton County Medical Examiner is now saying that an autopsy, made publicly available today, indicates death was accidental.
An examination did not reveal any sign of injury or fatal disease, and toxicology tests showed no evidence of a drug overdose.
"The most likely cause of Stacey English's death is cold exposure (hypothermia) complicating underlying neurological and psychiatric disorders," reads a press release from the medical examiner.
"Because cold exposure is an external, environmental condition, the manner of death has been classified as accident," the release continued.
As a result of the findings of the medical examiner's office, Atlanta police are closing the investigation.
"The Atlanta Police Department will be closing the case into the death of Ms. Stacey Nicole English. There will be no further statements issued in relation to this case and we will not be conducting interviews," Carlos Campos, the Public Affairs Manager for the Atlanta Police Department, wrote in an email.
Atlanta police announced on Jan. 23 that English's decomposing body was found under a tree in a heavily wooded area near the Aaron's Amphitheater at Lakewood. The location is roughly one mile from the spot where police found English's car abandoned, but still running, on Dec. 27.
English was reported missing by relatives on Dec. 27. Her cellphone, iPad and the device that opens the gate to her condominium complex were found inside her home. English's vehicle, a white, four-door 2006 Volvo S60 was missing.
The investigation and conclusions by the medical examiner have been peer reviewed by all six medical examiners in the Fulton County Medical Examiner's office. The agency said they will not be give interviews to the media.
English's family has yet to comment on the latest development in the case.
STACEY ENGLISH CASE PHOTOS: (Article Continues Below)
During previous interviews with the media, English's mother and stepfather, Cindy and Kevin Jamieson, said they were convinced she was murdered.
"There is no doubt in my mind that there had to be some type of foul play involved," Cindy Jamison told local news channel WSB-TV. "The way that she was found and where she was found ... We [want] to make sure that no one gets tired at this point -- it's only beginning, there is a lot more work to do."
The medical examiner's office said they will review the investigation again, "if further information becomes available which could impact on [the] cause or manner of death classification."