The parents of Gabby Petito have filed suit against the parents of Brian Laundrie.

Joseph Petito and Nicole Schmidt filed the lawsuit on Thursday, claiming that both Christopher and Roberta Laundrie knew that their son murdered Gabby.

The suit details that Brian confessed to Gabby’s murder on or around Aug. 28, 2021 and on the same day his parents spoke with an attorney.

Gabby was reported missing in August after going on a cross-country trip with her then-fiancé Brian that began in July.

Her parents reported her missing after not being able to get in touch with her and realizing that Brian returned home without their daughter in her 2012 Ford Transit.

Officials say Brian had been in Florida 10 days before the Gabby’s parents realized she was missing.

According to the lawsuit, Roberta blocked Gabby’s mother from contacting her via the phone and on Facebook.

They also claimed that the Laundrie’s refused to help them or law enforcement find Gabby. The Laundrie’s instead tried to make arrangements for Brian to leave the country.

“Christopher and Roberta Laundrie exhibited extreme and outrageous conduct which constitutes behavior, under the circumstances, which goes beyond all possible bounds of decency and is regarded as shocking, atrocious, and utterly intolerable in a civilized community,” the lawsuit read.

Gabby’s remains were located in Wyoming on Sept. 21 in Bridger-Teton National Forest.

Medical examiners reported that Gabby’s cause of death was blunt force injuries to the head and neck with manual strangulation. She was said to have died on August 27th.

Brian was reported missing several days before Gabby’s body was discovered. Officials found his body in October along with a notebook where he confessed to Gabby’s murder.

Brian was said to have committed suicide.