Gabby Petito's cause of death was ruled to be strangulation and the manner of death was homicide, Teton County Coroner Dr. Brent Blue said.
In particular, the cause of death was "manual strangulation/throttling," according to the coroner's verdict, a legal document Blue filed on October 5 with the Teton County Clerk of District Court.
"We believe this was strangling by a human being," Blue said.
Blue earlier said the time of Petito's death was estimated to be about three to four weeks before her body was found on September 19 in Bridger-Teton National Forest in Wyoming, an approximate time that matches the timeline of when she last spoke with her family.
Richard Stafford, the Petito family's attorney, said in September, Petito FaceTimed with her mother August 24 and exchanged texts over the following three days. The family received one last message on August 30 which read, "No service in Yosemite," but they doubt she wrote it, Stafford said.
The autopsy included a whole body CT scan, an examination by a forensic pathologist and by a forensic anthropologist, and a toxicology analysis, Blue said at the news conference.
He declined to provide further details about Petito's autopsy or a potential suspect, saying he was limited in what information he could legally release.
Gabby's fiancé Brian Laundrie, who is currently on the run, is considered a person of interest in relation to her death.