By CBSMiami.com Team

MIAMI (CBSMiami) – The Teton County, Wyoming coroner said Gabby Petito died as a result of strangulation in his final autopsy report.

Coroner Dr. Brent Blue discussed Petito’s autopsy during an afternoon news conference.

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Petito’s body was outside in the ‘wilderness’ for three to four weeks before it was discovered, Blue said.

Blue previously ruled the manner of her death a homicide in his preliminary findings, but the cause of death remained pending further autopsy results.

Petito had spent the summer traveling the western U.S. with her fiancé, 23-year-old Brian Laundrie, and documenting their adventures on social media. But when Laundrie returned to the Florida home they shared with his parents in their van, Petito wasn’t with him.

She was first reported missing by her parents on September 11, and after an extensive search, her remains were found on September 19 in Wyoming’s Bridger-Teton National Forest.

The mystery has deepened given the disappearance of Laundrie, who went for a hike in a local Florida nature reserve shortly after Petito was reported missing, according to his parents.

Laundrie has not been charged in the death of Petito, but he was indicted on charges of using two financial accounts that did not belong to him in the days following her death.

Petito’s final days
From the posts on social media, Petito’s final days looked idyllic. But after she was reported missing, accounts surfaced of rising conflict between the couple.

Petito called her mom regularly, and those conversations appeared to reveal there was “more and more tension” in Petito’s relationship, according to a police affidavit for a search warrant of an external hard drive found in the couple’s van.

On August 27, an “odd text” from Petito worried her mother that something was wrong, according to a search warrant.

“Can you help Stan, I just keep getting his voicemails and missed calls,” the message read, according to the affidavit. Stan was a reference to Petito’s grandfather, who her mother said Petito never referred to that way.

Along their travels, the couple was stopped by police after a 911 caller told dispatchers August 12 he saw a man hitting a woman, according to audio provided by the Grand County Sheriff’s Office in Moab, Utah.

“We drove by and the gentleman was slapping the girl,” the caller said. “Then we stopped. They ran up and down the sidewalk. He proceeded to hit her, hopped in the car and they drove off.”

CNN obtained dispatch audio recordings from the Grand County Sheriff’s office last month that shed more light on what Moab police were told about “some sort of altercation.”

And on August 27, a witness described a “commotion” as they were leaving the Merry Piglets Tex-Mex restaurant in Jackson, Wyoming.

Petito was in tears and Laundrie was visibly angry, going into and out of the restaurant several times, showing anger toward the staff around the hostess stand, witness Nina Angelo said. The couple’s waitress was also visibly shaken by the incident, said Angelo who added that she did not see any violence or physical altercation between Petito and Laundrie.

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A manager at Merry Piglets, who declined to give her name, did see “an incident” at the restaurant and called the FBI, she told CNN. The manager declined to describe what happened and said the restaurant did not have surveillance video of the incident.

The search for Laundrie
Before he disappeared, police in North Port were surveilling Laundrie as best they legally could, a police spokesperson told CNN.

Investigators said Laundrie’s parents told them on September 17 that he had left home days earlier and was headed to the nearby Carlton Reserve — sparking a search of the nature reserve’s 25,000 acres. Initially, his parents said he left on September 14, but last week, Laundrie family attorney Steven Bertolino said, “We now believe the day Brian left to hike in the preserve was Monday, September 13.”

When he left, he didn’t take his cell phone and wallet with him, and his parents were concerned he might hurt himself, according to a source close to Laundrie’s family.

At the time, Laundrie was not wanted in connection with a crime, but North Port Police spokesperson Josh Taylor said Laundrie had an “enormous amount of pressure” on him to provide answers in Petito’s disappearance.

The FBI searched the Laundrie home on September 20, removing a number of items and towing away a Ford Mustang convertible.

Attention then turned toward the Carlton nature preserve, where authorities combed through swampland filled with snakes and alligators, utilizing drones, dive teams, and bloodhounds.

After more than a week of searching for Laundrie, the FBI went back to his parents, asking for personal items of his to assist with DNA matching. They provided what they could, Bertolino, the Laundries’ lawyer, told multiple news outlets.

Laundrie’s father has participated in a search of the nature reserve for him, but he has no plans to assist in police searches and the couple will not take a polygraph test, Bertolino said.

Remembering Gabby
The identification of Petito’s remains sparked mourning and memorials across the country — for those who knew her as well as those who felt connected to her.

Joseph Petito described his daughter in a eulogy as a “happy girl,” who people would gravitate toward. She made others feel welcome, he said, and she loved being outdoors, scuba diving, hiking the Appalachian Trail, or snowboarding down sand dunes in Colorado.

“I want you to be inspired by Gabby, that’s what we’re looking for,” Joseph Petito said. “If there’s a trip that you guys want to take, take it now. Do it now while you’ve got the time.

“If there’s a relationship that you’re in that might not be the best thing for you, leave it now,” he said, an apparent reference to his daughter’s relationship with Laundrie.

Petito’s stepfather, Jim Schmidt, also gave a eulogy, telling those gathered, “Parents aren’t supposed to bury their children. That’s not how this is supposed to work.”

Petito provides “an example for all of us to live by,” Schmidt said, “to enjoy every moment in this beautiful world, as she did — to love and give love to all like she did.”

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CBSMiami.com Team