Gabby Petito's father has labeled Brian Laundrie and his family 'cowards' in a new Dr. Phil interview - as the the search for the only 'person of interest' in her death goes into its third week.
Joe Petito launched a scathing attack against the Laundries during the pre-tapped interview which airs on Tuesday, saying he did not believe has killed himself because 'he is a coward'.
Furious Petito then raged against Brian's parents Chris and Roberta who are holed up in their North Port, Florida home as daily protests against their perceived dishonesty carry on outside.
'Anyone who lived in that house is a coward, said Petito, justifying that by saying 'they don't know how to stand up for their actions'.
Gabby Petito's family went on Dr. Phil on Tuesday and called out Brian Laundrie's family. Pictured from L-R: step-mother Tara Petito, father Joe Petito, step-father James Schmidt, mother Nicole Schimdit
Joe Petito called Chirs and Roberta Laundrie, pictured, cowards for avoiding his family
Gabby Petito, right, and Brian Laundrie, were on a cross-country van trip when went missing on Aug. 24. Brian was the key person on interest and went missing himself on September 17
Joe and Nichole Petito said they had tried calling and texting the Laundries multiple times, asking for their daughters whereabouts to no avail.
'It's infuriating, Nicole said.
Joe added, 'We actually thought that they were both missing at that time.'
In one of the text messages, Joe said 'I'm going to call the police, just letting you know, because we have no idea.'
'A normal parent when you text someone that [you] are going to call the cops because you can't find your child, they would reply. No response. Nothing.'
Gabby's step-father, James Schmidt, also revealed that he was the one to identify Gabby's body, which was found in the Grand Teton National Park, in Wyoming, last month.
Schmidt said that when the body was found on September 19, police showed him an article of clothing that he matched as one of her favorite sweatshirts from a local New York shop.
'We knew it was hers,' Schmidt said.
Schmidt was in Wyoming to help search for his missing step-daughter and set up a memorial for her at the site when it was confirmed that her body was found there.
Gabby's step-father, James Schimdt (left), said he had helped identify Gabby's body
The family's interview comes as Brian Laundrie's sister, Cassie, spoke to Good Morning America on Tuesday, urging him to 'come forward' and telling her parents to 'come clean' if they are involved in his disappearance.
Cassie first broke ranks and spoke out on Monday, saying she 'didn't know' if her fugitive brother had murdered his girlfriend Gabby Petito and claimed that their parents refuse to talk to her.
Chris and Roberta Laundrie had been initially reluctant to cooperate with the investigation regarding the missing Gabby until Brian went missing on September 17.
Cassie also said she is 'livid' at her parent's lawyer Steve Bertolino, who told the press Friday that Cassie saw her brother twice since Gabby's disappearance – on September 1 and 6 – despite her previously telling ABC's Good Morning America, 'I haven't been able to talk to him. I wish I could talk to him.'
Cassie was seen confronting a group of protesters, which had rallied outside her home since Bertolino's statement three days ago and interrogated her about them on October 4.
'I am losing my parents and my brother and my children's aunt and my future sister-in-law on top of this and you're not helping,' Cassie told them.
Cassie Laundrie refused to defend her brother Brian's innocence in the murder of Gabby Petito and claimed that their parents refuse to speak with her. She is seen above with her husband James Luycx in an interview with protesters outside her home on October 4
She spoke to protesters who remained outside her house since the lawyer's statements, which contradicted media reports that Cassie hadn't seen Brian. Above, Brian and Petito were in an Instagram photo on their cross-country trip on June 26
A protester asked Cassie if she thinks her parents were involved in Gabby's death, to which she said, 'I don't know. We have literally been finding out everything from the news like everyone else.'
Asked if she would you like your brother to turn himself in, Cassie says, 'Of course.'
At one point, she is asked, 'Based on all the stuff on the Internet, do you think that Brian killed Gabby?'
'I don't know,' she says.
Cassie also said that she has never seen Brian hit Gabby or act violently toward women.
Newly-released bodycam footage has revealed Gabby Petito told cops Brian Laundrie had hit her and cut her face by grabbing her 'with his nail' during the August 12 domestic incident
Dispatch audio from the Moab Police Department, in Utah, revealed that Gabby and Brian had been in a fight on August 12, with police being told that Brian hit Gabby.
Joe spoke out against domestic violence on Monday in a photo tribute of his late daughter.
He posted a photo of Gabby walking on the boardwalk holding two young boys' hands, with the caption: 'We have to do better. Changes are coming. Now is the time. Don't be silent.'
It was hashtagged #domesticviolence and #domesticviolenceawareness.
In an Instagram post on Monday, Joseph Petito encouraged people to speak out about domestic violence
He had previously tweeted that people have reached out to him to share that they have been inspired by her his daughter's tragic death to prep before leaving their abusive relationships
The post comes just a few days after he tweeted that people have reached out to him to share
