Based on the timeline, I believe cellphone data will show where Gabby’s phone was in relation to Brian’s phone at the time the ‘Yosemite’ text was sent, and it could prove that the phones were traveling together after her death.
August 24: Gabby FaceTimes with her mother and tells her she is leaving Utah and heading to the Teton range in Wyoming. Gabby is seen with Brian checking out of a hotel in Salt Lake City, Utah.
Gabby Petito's cause of death was strangulation, coroner says - Local News 8
August 24: Roberta Laundrie initially made reservations for
2 people at Soto Park Campground for September 1-3.
Laundrie family changed Fort De Soto campground reservations before Brian returned home, docs show
August 25: Gabby posted a series of photos on Instagram in front of a butterfly mural in Ogden, Utah. It would be her final post on Instagram.
August 25: There are multiple texts between Gabby and her mother. The young woman's family believes she is in the Tetons on this date.
August 26: Gabby Petito liked a friend’s picture on Instagram.
Gabby’s Instagram likes
August 27: Gabby liked another picture on Instagram at 10:35AM EST. There were more texts between Gabby and her mother, during which her family believes she remains in the Tetons. According to the missing persons report, her mom received the last photo on this date. Petito texts a friend via Snapchat she was heading for Yellowstone. This is also the day the “Stan” text message was sent: “Can you help Stan, I just keep getting his voicemails and missed calls.”
Missing persons report
August 29: Gabby failed to call her friend to finalize plans and meet sometime in September.
August 29, 11 PM: A witness saw Brian alone in the van pulled in at the gas station in Jackson. He was in a bad mood, cursing at himself while throwing garbage away and then driving away.
imgur.com
August 30: Gabby’s mom says at
7AM (not sure if New York time or Wyoming Time) received the last text message from her phone, which read: “No service in Yosemite.”
Brian Laundrie manhunt: Gabby Petito reported missing one month ago
August 30: 7 songs were added to one playlist on the Nomadic Statik Spotify.
Spotify
August 31: 4 songs were added to the Spotify Playlist.
August 31: At the 59:50 mark - someone’s sister who works at the gas station in Benton Illinois says that the FBI were at her workplace asking for video evidence on the case. He says that’s the last place where Gabby’s credit card was used. Apparently it was used at 2 different branches of the same gas station in the same town
Reports: Laundrie credit card purchases possibly linked to Benton, IL gas station - NewsBreak
August 31: Roberta cancelled their camping reservations for
2 people.
August 31 or September 1?: According to the search warrant, which is dated
September 15, Gabby’s phone was turned off for approximately
15 days,
starting August 31st or September 1st.
August 31, 9:19PM EST: Brian’s Instagram account liked a PETA post on Instagram that was posted on August 31.
September 1: Brian arrived to North Port in Gabby’s van at
10:26AM
September 3: Roberta made a new reservation for
3 people to camp on the weekend of September 6-8.
September 4: New phone for Brian was purchased at an AT&T store.
September 13: Brian left his newly purchased phone and wallet at home to go for a “hike at the Carlton Reserve.”
Authorities do not have the phone Brian Laundrie had with him on the couple's trip, nor do they have Gabby Petito's phone.
Neither phone was in Gabby’s van, which Brian Laundrie drove back to Florida. Gabby Petito's fiancé Brian Laundrie was under surveillance before he disappeared, police say - CNN
I mention this because there was a case of a guy in Colorado that killed his ex-fiancé, and one of the things that got him was his and her cellphones pinging off the same tower when they were supposedly in separate locations.
