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.

There have been other documentaries about Petito and Laundrie in recent years, but this one is set apart because it includes extensive interviews with her parents and stepparents. Petito’s mom and stepdad, Nichole and Jim Schmidt, and her dad and stepmom, Joseph and Tara Petito, all took part in the series.