Reality TV star Duane Chapman, better known as "Dog the Bounty Hunter," has now joined the search for Laundrie.
He says he got a tip that Laundrie and his parents camped at Fort de Soto Park in Florida twice in early September, just days after Laundrie returned home without Petito.
"They were registered, and they went through the gate on camera," he said. "Allegedly, what we're hearing, is two people left on the 8th. Three people came on the 6th, and two people left on the 8th. I think he's been here for sure."
One family spoke out to an ABC station about their experience camping next to the Laundrie family.
Laundrie's attorney confirms the family did stay at the park, 75 miles from their home and he says they "all left the park" although he did not say if they all went home together.
The 22-year-old Petito was found dead in Wyoming on September 19, and her parents spoke out to the media Tuesday about their heartbreak and the latest on the investigation.
They unveiled matching tattoos designed and inspired by Gabby reading, "Let it be" and they vowed to help families of other missing people through a foundation in her name.
"We need positive stuff to come from the tragedy that happened," said Joe Petito, Gabby's father.
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Their lawyer is urging Laundrie to surrender.
"We're asking you to turn yourself into the FBI or nearest law enforcement agency," he said.
The FBI is now leading the search for Laundrie.
His parents' attorney released a statement saying they don't know where Brian is, and that speculation they helped him hide "is just wrong."
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