In 2021, Brian Laundrie and his fiance Gabby Petito, were traveling America and documenting their journey via Instagram and Youtube. But just weeks into their trip, Gabby's socials fell silent. So when Brian Laundrie returned to his parents' home alone, suspicion was immediately cast on him - did he have something to do with his fiance's sudden disappearance? Gabby's family and the police were determined to find out, as they launched a huge investigation which captured the attention of the American public. Little did they know, the answers would only be revealed months later, in a notebook.

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