According to ABC (no reason to dispute the sauce here) she was officially reported missing on Sept. 11th. Go figure.
https://abcnews.go.com/US/gabby-petito-case-timeline-travel-bloggers-disappearance/story?id=80126596
That was fantastic work anon, I have used it and will continue to use it. o7
Looks like Ben Giles took the bait.