Police in North Port, Florida, said they don’t know what to believe when it comes to the search for Brian Laundrie, the fiance of Gabby Petito.

North Port police officer Josh Taylor told NewsNationNow.com that police are still searching for Laundrie at the 25,000-acre Carlton Reserve, despite not having seen anything at the reserve yet. Authorities hope to find something soon.

“We’ll continue to search. You know, we could be searching that Carlton Reserve and nearby lands for a long, long time,” he said.

Laundrie is wanted as a person of interest in the disappearance of Gabby Petito, his fiance. Petito and Laundrie went on a road trip over the summer. But only Laundrie returned home on Sept. 1, driving Petito’s van. Petito was reported 10 days later on Sept. 11. Her body was found on Sunday, Sept. 19, outside of a Wyoming national park.

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But Laundrie went missing as well, which raised questions in the case. On Sept. 17, the Laundrie family told North Port police that Laundrie had gone missing on Tuesday, Sept. 14. But their story later changed, saying they last saw him on Monday, Sept. 13. Laundrie hasn’t been seen since.

But do police believe the Laundries’ changing story? The North Port police spokesman Taylor said, “I don’t know necessarily what to believe anymore.”

Laundrie’s parents, Chris and Roberta Laundrie, said they don’t know where their son is right now. But the Laundrie family has started working with the police to find him. The Laundrie family’s lawyer, Steven Bertolino, told NewsNation Now reporter Brian Entin last week that Chris Laundrie is helping authorities with their search.

“Chris Laundrie is assisting Law Enforcement today in the search for Brian. Chris was asked to point out any favorite trails or spots that Brian may have used in the preserve. Although Chris and Roberta Laundrie provided this information verbally 3 weeks ago it is now thought that on-site assistance may be better,” Bertolino said in a statement sent to Entin. “The preserve has been closed to the public and the Laundries as well but the parents have been cooperating since the search began.”

Taylor, from North Port police, said that this is a sign of good faith in the search for Brian Laundrie. But, he’s unsure what that means for what comes next.

“It’s certainly possible that they’re expressing what they know. But we’ll see. This is an ongoing investigation that will continue to evolve. I think you saw yesterday the (Laundrie) family was out there helping in the search, I think it’s a sign of them trying to work with investigators,” said Taylor.