Brian Laundrie's sister, Cassie Laundrie, has spoken out about her estranged relationship with her parents and her lack of involvement in the murder of Gabby Petito.

Gabby Petito' unpacks the true story behind the chilling case that captivated the nation almost four years ago.

Roberta and Chris Laundrie issued a damning statement against the Netflix true-crime documentary last week (19 Feb)