Before Gabby Petito disappeared while on a cross-country van trip with her fiancé, her conversations with her mother appeared to reveal Petito had "more and more tension" with her travel partner, reports suggest.
The affidavit, filed by Florida police last week, offers new insight into what investigators have gleaned as they try to determine not only what happened to Petito but also the current whereabouts of the fiancé who returned to Florida this month without her.
Human remains that officials said are consistent with Petito's description were found Sunday in an undeveloped camping area in Wyoming's Bridger-Teton National Forest on the eastern edge of Grand Teton National Park.
FBI is expected to release the results of the autopsy soon.
Meanwhile, the police and FBI continue to search for her fiancé, Brian Laundrie at a Florida nature reserve where his parents reportedly said he indicated he was going last week.
Petito, 22, and Laundrie, 23, had been road-tripping in a white van from New York through the US West over the summer and documented their travel on social media.
Those posts abruptly stopped in late August, and Laundrie returned to his North Port, Florida, home on September 1 in their van without Petito, whose family reported her missing September 11. Authorities are looking for Laundrie, whose parents told investigators he left home with a backpack September 14, and have searched his home, including on Monday.
The case has become an obsession for many, spurring digital detectives to comb through the couple's online trail. The story has also further highlighted the tens of thousands of unsolved missing persons stories.
Before she vanished, Petito sent multiple text messages and had many talks with her mother via cell phone during her trip, Florida police wrote in an application filed last week for a search warrant for an external hard drive found in the couple's van.
In those conversations, there "appeared to be more and more tension between her and Laundrie," the affidavit reads. On August 27, Petito's mother received one last communication from her daughter, which she called an "odd text," the affidavit says.
The message read: "Can you help Stan, I just keep getting his voicemails and missed calls." Because the text message referred to Petito's grandfather as Stan, her mother was concerned that something was wrong, the warrant states.
Following that text message, Petito's phone was no longer operational and she stopped posting anything on social media about their trip, the warrant says.
One more text came on August 30 that read, "No service in Yosemite," but her family doubts she wrote it, Richard Stafford, an attorney representing Joseph Petito and her mother, Nichole Schmidt, said.