Footage shows the last moments of Gabby Petito caught on a supermarket CCTV walking with her boyfriend Brian Laundrie just hours before she was killed.
Gabby's remains were later found in a nearby swamp.
Gabby, 22, and Laundrie, 23, had been travelling across the United States documenting their travels on social media when the young woman was reported missing on September 11 last year.
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