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.

“If you’re new here. And just starting to attack me today. I’ve been non contact with my parents for almost two years,” Cassie Laundrie wrote on Instagram. “Have fun.”

Brian Laundrie’s older sister is disputing statements from a police detective overheard in bodycam video from the night police first knocked on her door as they began the search for missing Petito on Sept. 11, 2021.

Cassie Laundrie has long denied knowledge of what happened between her parents and brother during the search for Petito. 

Roberta Laundrie unlocks her car in her driveway in North Port, Florida on Wednesday, October 11, 2023. (Mark Sims for Fox News Digital )

“We are just as upset, frustrated and heartbroken as everybody else,” she said outside her home in October 2021. “I am losing my parents and my brother and my children’s aunt and future sister-in-law on top of this.”

The sister was supposed to be deposed in a lawsuit in which her parents were sued by Petito’s parents – but her interview was canceled. The sides reached an out-of-court settlement last year.

If you or someone you know is suffering from domestic violence, please contact the National Domestic Violence Hotline at 1−800−799−7233 (SAFE).