Associated Press

ST. PETERSBURG, Fla. — The FBI on Thursday identified human remains found in a Florida nature preserve as those of Brian Laundrie, a person of interest in the death of girlfriend Gabby Petito while the couple was on a cross-country road trip.

The remains, a backpack and notebook believed to belong to Laundrie were discovered Wednesday in a Florida wilderness park, according to the FBI. The area where they were found had been under water during earlier searches.

The FBI’s Denver office said in a news release a comparison of dental records confirmed that the remains were Laundrie. A lawyer for his parents, Steve Bertolino, also confirmed in a statement they were told the remains were those of their son.

“We have no further comment at this time and we ask that you respect the Laundrie’s privacy at this time,” the statement said.

The FBI statement did not list a cause of death. It wasn’t clear how long the remains may have been submerged in water.

The discovery of the remains concluded a massive search involving federal, state and local law enforcement that began shortly after Laundrie disappeared Sept. 14, two weeks after the 23-year-old returned alone to his parents’ home in North Port, Florida.

The investigation into Petito’s slaying, however, is not yet concluded. But only Laundrie has ever been identified by law enforcement officials as a person of interest in the case.

Petito’s family reported her missing Sept. 11, launching a search that garnered worldwide media attention and, in Laundrie’s case, focused largely on the Carlton Reserve wilderness park near the Laundrie home. It is a densely wooded, swampy area that’s home to alligators, coyotes, bobcats, snakes and numerous other creatures.

The couple first met as teenagers on Long Island, New York, and more recently moved to Florida’s Gulf Coast to live with his parents.

They first gained an online following while on their trip in a converted Ford Transit van in videos filled with happy scenes that may have concealed deeper problems. After Petito disappeared, the case became a true-crime obsession on social media.