MIAMI (AP) — An attorney for the family of Brian Laundrie said Tuesday that he fatally shot himself in the head.

Laundrie had been the subject of a manhunt for more than a month as investigators searched for clues in the slaying of his girlfriend, Gabby Petito, during their cross-country van trip together.

Attorney Steve Bertolino said in a statement that Laundrie’s parents have been informed that the cause of death was a gunshot wound to the head, and the manner of death was suicide.

“Chris and Roberta are still mourning the loss of their son and are hopeful that these findings bring closure to both families,” Bertolino said.

Found in a Florida nature preserve, Laundrie’s skeletal remains were positively identified last month using dental records.

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, has not yet concluded. But only Laundrie was ever 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.