Laundrie's attorney said Dog and Walsh inserted themselves in the case so "they can clear the cobwebs off their names."
"Dusty relics like that Dog and John Walsh need a tragic situation like this so they can clear cobwebs off their names and give their publicity-hungry egos some food," Bertolino claimed.
As Radar previously reported, the 68-year-old reality star joined the manhunt for Brian last month after the FBI issued an arrest warrant for the fugitive for attempting to use an "authorized card" that presumably belonged to Gabby during her disappearance.
Since his involvement, Dog had received multiple tips, including information about Brian's camping trip in Forth De Soto Park with his parents after returning alone from his cross-country trip with Gabby.
However, earlier this month, professional bounty hunters in Florida claimed that Dog does not have a bounty hunter or private investigator license in the state, making him unable to arrest Brian if he locates him. Dog would be charged with possible kidnapping charges if he did.
This also isn't the first time Dog was accused of doing the job for fame. Last week, one of Dog's daughters Cecily claimed that her dad's involvement in the case is nothing more than a "publicity stunt."
"It's just a publicity stunt. That's really what it is. He needs to back off and let the FBI handle it," Cecily told The Sun.
The search for Brian continues after his parents claimed he had gone missing since Sept.13, when he left their home to go on a solo hike at Carlton Reserve. Days later, Brian's parents reported him missing to the authorities.
Upon learning the result of Gabby's autopsy this week, Brian's parents issued a statement via their lawyer saying, "Gabby Petito's death at such a young age is a tragedy. While Brian Laundrie is currently charged with the unauthorized use of a debit card belonging to Gabby, Brian is only considered a person of interest in relation to Gabby Petito's demise. At this Brian is still missing, and when he is located we will address the pending fraud charge against him."
Gabby's mom called the statement "garbage" and told the Laundrie family lawyer to "keep talking."