facebook page, gabby had told a friend over snapchat a few days before that text that she was heading to yellowstone, which is right by the tetons. not yosemite. which is about 800 miles away in california. we don't know if that text was actually sent from yosemite but we now know gabby petito wasn't there on august 30th but whoever had her phone that day may have wanted to make her family think she was. >> i don't think we can thank everybody enough. >> gabby's mom has said she doesn't believe her daughter wrote that last text. former fbi assistant director says the fbi is undoubtedly zeroing in on the location of gabby's cell phone on the 30th to determine if the text was actually sent from yosemite. >> seems to me to point to a coverup. cell phones can be tracked if they -- that is something that i