Gabby Petito was traveling across the country in a van with Brian Laundrie, who later admitted to strangling her.

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.

His sister Cassie Laundrie has broke her silence following the release of the Netflix documentary, stating that she knew nothing about Petito's disappearance until police called. "No one from any family contacted me until detective Barry called me," she wrote on Instagram.