Brian Laundrie

The parents of Gabby Petito, whose disappearance sparked a social media uproar, also accused her fiancé's parents of trying to help him leave the country.

He also allegedly texted Nichole Schmidt from Petito's phone on Aug. 30 to make her think that her daughter was still alive. Laundrie's remains were found Oct. 20 in the Carlton Reserve just north of the Myakkahatchee Creek Environmental Park in Florida along with a notebook containing statements that he was responsible for Petito's death. According to the complaint, Laundrie, who killed himself last fall after claiming responsibility for Petito's death, told his parents what he had done the day after she died on Aug. 27.

Gabby Petito's parents accused the mother and father of presumed killer Brian Laundrie of hindering the search for their murdered daughter in a lawsuit.

This fundamental legal principle renders the Petito’s claims to be baseless under the law. On Sept. 14, Laundrie's parents issued a statement, supporting the search for Petito, according to the lawsuit. "Despite the fact that Joseph Petito and Nichole Schmidt implored Christopher Laundrie and Roberta Laundrie to tell them if their daughter was alive, and if she was not, where her remains were located, Christopher Laundrie and Roberta Laundrie refused to respond to either Joseph Petito and Nichole Schmidt, or law enforcement," plaintiff's lawyer Patrick Reilly wrote.