Reports of a possible sighting of Brian Laundrie in Newman, GA could not be confirmed by police.

"We have not had an official sighting with the the City of Newman," Newman Police Department Chief Blankenship told Fox News Sunday.

As the manhunt for Florida fugitive Brian Laundrie enters its third week, questions are mounting about how he’s been able to elude authorities for this long and whether his parents may have helped give him a head start.

Chris and Roberta Laundrie have not been accused of any wrongdoing, but critics have taken to scrutinizing their actions in the weeks following the disappearance of their former future daughter-in-law, Gabby Petito, who was found dead in Wyoming at a campsite she shared with their son. They said nothing about the fact that she was missing and went on a Labor Day camping trip.

"If they provided false information to law enforcement that let Brian laundry take off and get a week head start, or if the parents sent law enforcement on a wild goose chase, searching the preserve when he wasn't there, there's certainly a basis to charge them," said Neama Rahmani, a former legal prodigy and federal prosecutor.

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A Florida man hiking the Appalachian Trail claims he saw Brian Laundrie driving in a white pickup truck around 12:30 a.m. ET on Saturday in Tennessee near the North Carolina border.

Dennis Davis, who spoke to a number of news outlets on Saturday including Fox News Digital twice, said it didn't at first register that the driver may have been Laundrie, but after the encounter, he looked up photos of the fugitive wanted on debit card fraud charges, and he then felt convinced enough to call in the sighting to FBI twice, as well as 911 operators in Tennessee and North Carolina.

"There is no doubt about it. That was Brian Laundrie I was just talking to. 100%. Not a doubt in my mind," Davis said of the encounter after he looked up both a portrait and profile shot of Laundrie on his phone.

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Dog the Bounty Hunter searches an island off Fort De Soto Park near St. Petersburg, Fla. (Michael Ruiz/Fox News)

Duane "Dog" Chapman, also known as Dog the Bounty Hunter, joined the search for Gabby Petito late last month after friends, fans and family urged him to get involved, he said.

He and his team are working long days – from sun-up to sundown – sniffing out tips, fact-checking rumors and physically in the field with volunteer search teams looking for clues of Laundrie’s movements. Last week, Chapman and a private K-9 unit searched a pair of islands off of Fort De Soto, where Laundrie may have hidden out.

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Newly obtained high school yearbook photos give a glimpse of Gabby Petito and Brian Laundrie as teenagers, years before their ill-fated cross-country road trip as a travel-blogging couple.

The images show Petito in her sophomore year and Laundrie as a junior at Bayport-Blue Point High School in New York.

She looks similar, younger but with the same beaming smile. He is chubbier, with a chinstrap beard, peach-fuzz mustache and a full head of hair.

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