The attorney for the family of Brian Laundrie has chalked up differences in the timeline of when the Florida fugitive was reported missing to a lack of communication between law enforcement agencies and tells Fox News Digital there is "no discrepancy between the FBI and the Laundries."

Steven Bertolino represents Chris and Roberta Laundrie and their son, Brian, who is a person of interest in the murder of his fiancée, Gabby Petito. Brian is also wanted on separate charges of unauthorized use of her bank card. 

Bertolino spoke with Fox News Digital by phone Thursday, and he explained that he personally notified the FBI immediately that Brian never returned home from his hike of Myakkahatchee Creek Environmental Park on Sept. 13. 

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"We notified the FBI that night or the next morning that Brian didn't come home from his hike. So, the FBI was aware that Brian didn't come home from day one," Bertolino explained, emphasizing there are no discrepancies from that communication with the FBI.

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A spokesperson for the FBI’s Denver field office declined to comment, while a rep in Tampa did not respond to Fox News Digital’s requests for a response to this new revelation Thursday morning. 

Speaking to reporters during a related press conference on Sept. 16, North Port Police Chief Todd Garrison was asked if he knew where Laundrie was at that moment. "Yes," Garrison responded. 

But during Thursday’s interview with Fox News Digital, Bertolino explained the confusion in Garrison’s defense.

"There was never any communication between myself and law enforcement in the next three days. They never asked me, and I never informed them that Brian didn't come home," Bertolino explained, adding "North Port PD was under the assumption that Brian was home".

Confusion grew further when, on Sept. 17, authorities told Bertolino and the Laundries that they received a tip that Brian was in Tampa. 

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"They wanted to meet with us on Friday. I was shocked and said, 'That's good. You found him in Tampa,' and they said, 'What do you mean? I thought he's at the house,’" Bertolino recalled.  "I said, 'No, I told you the other day he never came home.' And that's how it played out."

Brian Laundrie and his home in North Port, Florida

Brian Laundrie and his home in North Port, Florida

He continued: "Once we clarified exactly what happened, it was a series of just, I don't want to say miscommunication, but more, no communication."

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Josh Taylor, a spokesperson for North Port Police Department (NPPD), struck back in an email to Fox News Digital Thursday that in "no way was any of the NPPD’s actions, comments, or reporting reflective of the NPPD having information that Brian Laundrie was missing on that Monday the 13th."

"Please keep in mind that NPPD was an assisting agency until Tuesday night September 14th," he wrote. "I’m confident that if that were true, the information would have been relayed."

Taylor noted that NPPD was "pressing hard" for information from the family at the time, even addressing Bertolino in a public tweet on Sept. 15 asking for his help in coordinating a conversation with Laundrie. 

"No response was given in any form," Taylor said Thursday. "Our door to getting info, including Brian being potentially missing, was wide open."

He reiterated that the police department was not notified about Brian's possible disappearance until that Friday, Sept. 17.

"I was in the room when it happened," Taylor continued. "The FBI called and informed us that the family now believed he was missing since Tuesday and we needed to head over to the home to begin a missing person investigation. Remember, they later changed that story to Monday."

North Port Police Chief Todd Garrison; North Port Public Information Officer Josh Taylor

North Port Police Chief Todd Garrison; North Port Public Information Officer Josh Taylor (North Port Police)

He emphasized that police were "working with the best intelligence on what we thought at the time, working with a family who refused to cooperate in the investigation."

Petito's family also seemed to be in the dark that Friday, Sept. 17.  Her stepfather, Jim Schmidt, was visibly shaken during a television interview when Taylor revealed Laundrie's parents were now claiming they last saw Brian on Tuesday.

On Wednesday, the FBI confirmed to reporters that investigators found what appear to be human remains, "along with personal items, such as a backpack and notebook belonging to Brian Laundrie," just hours after Laundrie's parents searched the Myakkahatchee Creek Environmental Park.

"These items were found in an area that, up until recently, had been underwater. Our evidence response team is on scene using all available forensic resources to process the area," said Michael McPherson, special agent in charge of the FBI's Tampa division. "It's likely the team will be on scene for several days."

Officials have not yet said whether the remains are Laundrie’s. 

Chris and Roberta Laundrie said Brian, 23, left his family’s North Port, Florida, home on Sept. 13 to hike in the Myakkahatchee Creek Environmental Park, located alongside the T. Mabry Carlton Jr. Memorial Reserve. The Laundries' attorney had initially identified the date of Brian's disappearance as Sept. 14 before changing the timeline weeks later. 

Since Laundrie's disappearance, state, local, county and federal law enforcement have extensively searched the reserve and the Myakkahatchee, where Laundrie is said to have parked his car at the time. 

Laundrie and 22-year-old Petito left for a trip in mid-June with the plan to visit national parks in her white converted Ford Transit. The couple had met years earlier on Long Island, New York, where they grew up, and later moved into the North Port home with Brian’s parents.

Brian Laundrie returned home to North Port on Sept. 1 — with the van, but without Petito. 

Petito’s mother, Nichole Schmidt, reported her missing to Suffolk County Police in New York on Sept. 11. Search teams discovered Petito’s body near Wyoming's Grand Teton National Park on Sept. 19 and announced shortly thereafter that she had been the victim of a homicide. 

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Authorities later said she died of "manual strangulation."