Brian Laundrie's parents on Friday filed a motion to request evidence from Gabby Petito's parents as they prepare their defense in the civil lawsuit scheduled for trial this year. 

According to The Sun, Chris and Roberta Laundrie asked for communication between Petito's parents and state and federal agencies.

The elder Laundries are seeking communication that Joe Petito and Nichole Schmidt had with state and federal agencies, including those they had with their son Brian, Gabby, or their family.

Laundrie's parents sought all phone records from Petito and her parents between July 2, 2021, to September 30, 2021.

Their request also includes any documents or communication regarding compensation or contracts related to publishing, movie, or TV rights.

Laundrie's parents reportedly filed a total of 21 requests, giving Petito's parents 30 days to submit the evidence.

A hearing about the matter has yet to be scheduled. Petito's parents filed a civil lawsuit against Laundrie's parents in Florida last March, alleging that Laundrie's parents knew their son killed Petito and were trying to help him flee.

The civil lawsuit is reportedly scheduled to go to a jury trial in August. During the pre-trial hearings last year, Judge Hunter Carroll denied Laundrie's parents' motion to dismiss the lawsuit.

The judge also denied the elder Laundries' request to limit the questions asked during depositions.

In May, Schmidt also filed a wrongful death lawsuit against Laundrie's estate. Petito's family won in the wrongful death case last November and was awarded $3 million.

However, Laundrie's estate is estimated to be about $20,000. Petito's family reportedly plans to donate whatever funds they receive to the Gabby Petito Foundation.

READ NEXT: Gabby Petito Update: Parents Suing Brian Laundrie's Dad, Mom for Helping Son Get Away 

Brian Laundrie's Parents Turned on Their Lawyer Who Knows More About Gabby Petito's Death

Last month, Gabby Petito's parents filed a motion to include Brian Laundrie's family lawyer Steven Bertolino as a co-defendant in the civil suit.

Petito's parents filed the Second Amended Complaint to add Bertolino as they believed he was also aware of their daughter's death before her body was found, The Sun reported.

Petito's family lawyer Pat Reilly previously said that it is believed that by the time the attorney issued his statement on September 14, 2021, Bertolino and the Laundries knew that Petito was already dead.

Bertolino representing the elder Laundries released the following statement on September 14, 2021: "On behalf of the Laundrie family, it is our hope that the search for Miss Petito is successful and that Miss Petito is reunited with her family."

Laundrie's parents had since filed a defense against the motion to add Bertolino as a co-defendant.

In their response filed Tuesday, the elder Laundries argued that Bertolino, who acted as their son's lawyer before he died, knows more about the Gabby Petito case than his clients.

"Mr. Bertolino's knowledge is certainly far more than the Laundrie parents," they noted.

However, they claimed that the lawyer cannot disclose what he knows or why he took certain actions because even after Laundrie's death, "Bertolino still owes a duty of confidentiality" to their son.

They added that making Bertolino a co-defendant in the case would partly turn the family and their attorney against one another. 

Brian Laundrie and Gabby Petito's Deaths

Gabby Petito disappeared while on a cross-country road trip with Brian Laundrie. The couple was traveling to Oregon when Petito stopped communicating with her family on August 25, 2021, when she was near Grand Teton National Park in Jackson, Wyoming.

Laundrie was named a person of interest by the North Port police after returning home to Florida on September 1 or 10 days before Petito was reported missing by her family.

By September 17, 2021, Laundrie had also gone missing, and the North Porth Police said they, along with the FBI, were searching for him and Petito.

Petito's body was found at the Spread Creek Dispersed Campground near Grand Teton National Park on September 19, 2021.

A Teton County, Wyoming coroner said she was strangled to death by a "human being," and the manner of death was a homicide.

On October 20, 2021, Laundrie's skeletal remains were discovered at the Myakkahatchee Creek Environmental Park in Florida.

His autopsy report showed that he died of a gunshot wound to the head, and the manner of death was suicide.

Last January, the FBI revealed that Laundrie confessed to killing Petito in a message left in his notebook.

The FBI said they found the notebook, along with a "backpack" and a "revolver," upon further search of the area where Laundrie's remains were discovered. 

The FBI noted that its investigation has concluded that Brian Laundrie was the only person responsible for Gabby Petito's "tragic death."

READ MORE: Here's How Idaho Murder Suspect Bryan Kohberger Was Eventually Caught for His Killings of 4 College Students 

This article is owned by Latin Post.

Written by: Bert Hoover

WATCH: Laundries Send List of Requests to Gabby Petito's Parents - From WFLA News Channel 8