The Teton County coroner in Wyoming announced Tuesday that Gabby Petito died by strangulation about three to four weeks before her body was found.

The coroner also confirmed Petito’s death was a homicide.

News 12 has obtained an official document from the Teton County Coroner about Petito's cause and manner of death. The cause is listed as “death by manual strangulation/throttling.”

As News 12 has reported, Petito was last seen alive Aug. 25 when she facetimed with her mother on a cross country trip with her fiancé Brian Laundrie.

Petito’s body was found Sept. 19 in Wyoming's Grand Teton National Park.

Meanwhile, Laundrie is still missing. He returned home to Florida on Sept. 1, but vanished on Sept. 13, two days after Gabby was reported missing.

Laundrie is a person of interest in the case, but right now is only facing charges for allegedly using Gabby's debit card.