Gabby Petito

Some of the biggest questions remain as the search for Brian Laundrie continues: What exactly did his family know, and when did they know it?

A man claims he spoke to someone he believes to be Brian Laundrie near the Appalacian Trail

“She is already saving lives,” Joseph Petito said of his daughter Gabby in a tweet Saturday.

It's now been one month since Brian Laundrie returned home to North Port without Gabby Petito. Questions are being raised about his sister and the last time she saw him.

Newly-released body camera video reveals more about the complicated and tumultuous relationship between Gabby Petito and Brian Laundrie and a fight they had weeks before her death.

The newly released video shows a different side of the Aug. 12 police stop in Moab, Utah.

Two agents pulled up to the North Port home where Brian Laundrie’s parents live. They went inside with a large paper bag and took a closer look inside the family’s parked camper amid the search for the missing suspect.

Sheriff Grady Judd is not involved in the Gabby Petito case, but the Polk County sheriff speculated on how he would’ve handled Brian Laundrie within his jurisdiction. For one, he said, Brian would have been taken into custody.

Brian Laundrie’s mother Roberta canceled camping reservations for two people at a Florida park on Aug. 31 and made new reservations for three people at the same park on Sept. 3, documents obtained by Fox News show.

The FBI is looking at surveillance footage from the area of Fort De Soto Park as part of their investigation into the whereabouts of Brian Laundrie, who has allegedly been missing since mid-September, Fox News has learned.

It's been nearly two weeks since 22-year-old Gabby Petito's body was found, yet officials say her widespread coverage may have assisted in finding a man from Houston, who went missing in mid-August.

Gabby's family, like many others, still want to know: Where is Brian Laundrie – the sole person of interest in her death?

A crew of four people carrying backpacks and other supplies left on boats with three K-9s

A Louisiana man believes he spoke with Brian Laundrie near Yellowstone National Park days before Gabby Petito’s disappearance, describing the interaction as an "odd encounter."

Gabby Petito’s family gathered Tuesday to thank law enforcement for their efforts to find their missing loved one and showed off matching tattoos in her memory. But with the hunt for her fiancé still underway, they had one message for Brian Laundrie: "Turn yourself in."

New details, confirmed by the family’s attorney Tuesday, help flesh out Brian Laundrie’s timeline after his return to Florida but may not necessarily shed any new light on where he is right now.

The family of slain traveler Gabby Petito has implored the public and news media to put the same energy into helping find other missing people as they did Petito, a 22-year-old woman who vanished on a cross-country trip with her boyfriend.

“I wanted to have her with me all the time,” Gabby Petito’s mother Nicole Schmidt said. “I feel it. This helps that.”

The head of Utah’s Moab Police Department requested a leave of absence just days after the city announced it would be investigating officers’ handling of a possible domestic violence case last month involving Gabby Petito and Brian Laundrie.