Brian Laundrie's parents have said they are 'concerned' for their missing son and have stressed they do not know where he is.
Chris and Roberta Laundrie have said they last saw their son, who is a person of interest following the death of his girlfriend Gabby Petito, on 14 September when he left their home in his silver Ford Mustang.
His parents say he told them he planned to go camping near the Carlton Reserve. His car was brought back to their home on 16 September and Laundrie's parents reported him missing the next day.
In a statement via their lawyer Steven Bertolino, the family said: "Chris and Roberta Laundrie do not know where Brian is.
"They are concerned about Brian and hope the FBI can locate him.
"The speculation by the public and some in the press that the parents assisted Brian in leaving the family home or in avoiding arrest on a warrant that was issued after Brian had already been missing for several days is just wrong."
Police and FBI have been searching the home of Laundrie's parents after declaring it a 'crime scene'.
The FBI have since issued a warrant for his arrest on charges 'related to Laundrie's activities following the death of Gabrielle Petitio' specifically that he used a debit card and another person's PIN number to make unauthorised withdrawals of up to $1,000 (£730).
North Port Police Department Commander Joe Fussell told Fox his team were working hard to track down the 23-year-old.
He said: "We are working as hard to find him now as we did on day one.
"That is really what is carrying us through. Is the drive to try to find Brian and try to put closure to this investigation."
He added: "We are not wasting our time out here. We are doing our due diligence to find Brian in an area that intelligence had led us that he could possibly be in."
On Saturday (25 September), Duane Chapman, better known as Dog the Bounty Hunter, said he had joined the search.
Chapman told Fox News: "We had a lot of requests that I get in on this. This is what I do for a living, for 45 years."
The 68-year-old has 13 children and he sadly lost his daughter to a car accident when she was the same age as Petito.
"I know what the victims feel like," he added.