From a seemingly perfect #vanlife to a haunting disappearance, American Murder: Gabby Petito delves into the chilling actions of Brian Laundrie.

Brian Laundrie's sister says she hasn't spoken to her parents in two years amid fallout from a new docuseries that reveals text messages between her and her mom that shows them joking about how police let Gabby Petito's killer slip out under their nose before ultimately killing himself in a park nearby.

Gabby Petito's father and stepmother, of Vero Beach, helped pass Florida legislation in memory of their daughter.

In a statement provided to PEOPLE by Laundrie family attorney Steven Bertolino, Chris and Roberta Laundrie say the new three-part documentary series American Murder: Gabby Petito

Brian Laundrie’s parents have ripped a new documentary about their son’s murder of girlfriend Gabby Petitio as being one-sided and riddled with inaccuracies — despite refusing to give their side of the story.