The parents of Blue Point native Gabby Petito have filed a lawsuit against Brian Laundrie's parents, accusing them of helping their son get away with the murder of their daughter.

The lawsuit alleges that Christopher and Roberta Laundrie were told by their son that he had murdered his fiancée, Gabby Petito. The suit alleges that the conversation happened on or around Aug. 28.

That is one day after Gabby Petito's family says they believe their daughter was killed.

Gabby Petito and Brian Laundrie were on a cross-country road trip on the West Coast. Brian Laundrie returned to his parent's house in Florida on Sept. 1 by himself.

At the time, neither Brian Laundrie, or his parents, would cooperate with law enforcement.

After a monthslong investigation, Brian Laundrie's skeletal remains were found along with a notebook claiming responsibility for Gabby Petito's death.

The lawsuit filed Friday says that the Laundries kept silent even though they knew about Gabby Petito's murder. It also says that they tried to get their son out of the country.

At the same time, there was a large search going on to find Gabby Petito.

Steven Bertolino, attorney for Christopher and Roberta Laundrie, released a statement, saying: "Assuming everyone the Petitos allege in their lawsuit is true, which we deny. This lawsuit does not change the fact that the Laundries had no obligation to speak to law enforcement or any third-party including the Petito family. This fundamental legal principal renders the Petito's claims to be baseless under the law."

Residents of Blue Point say the whole situation is "heartbreaking."

Bertolino says the Laundries will not be commenting under his legal advice.

Christopher and Roberta Laundrie have not been charged with any crimes.

The civil lawsuit is seeking damages for over $30,000.