There was a lot of strange speculation on social media about their situation, including involvement in a double homicide near Moab.
To me, Ms. Petito obviously looked distressed. Mental health issue/crisis (Aug 12), apparently, but certainly she was vulnerable. A caller to 911 apparently did state that her fiance struck her.
The latest developments include a couple who picked up Brian Laundrie (fiance) hiking along the highway on August 29, three days before he showed up in Florida driving the white van, without Ms. Petito. When the couple indicated they were driving to Jackson Hole (south of Spread Creek camping area) near Jackson, where he apparently want to to, he had them stop, and he exited the vehicle.
https://www.yahoo.com/gma/tiktoker-claims-she-picked-brian-114944770.html
FBI were tipped off to the location where a body matching the description of Ms. Petito was located by a couple who apparently videoed her white Ford Transit van with Florida license plates in the remote camping area; the as-yet-to-identifed body was found near that location. "Jenn and Kyle Bethune, part of a vlogging family known as Red White & Bethune on YouTube,
posted footage on Sunday showing a white van on their travels." The video was captured on August 27 at around 6 p.m. in Grand Teton National Park's Spread Creek Dispersed camping area.
https://www.msn.com/en-us/video/new...als-find-body-matching-description/vi-AAODsLq
Brian Laundrie disappeared from his parents home on Tuesday, September 14, 3 days after Ms. Petito's parents file a missing person report. At the time, Mr. Laundrie refused to provide any information to police. He responded through a lawyer, and his family stated that they hoped the Ms. Petito would be found alive and returned home.
What kind of person abandons a significant other (fiancé), shows up with that person's property/vehicle but without the s.o., refuses to provide information to police as to the whereabouts, then disappears? Mr. Laundrie exhibits incriminating behavior.