An attorney for the family of Brian Laundrie says he fatally shot himself in the head.

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.

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

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.

"Chris and Roberta Laundrie have been informed the cause of death was a gunshot wound to the head and the manner of death was suicide," Bertolino said in a statement. "Chris and Roberta are still mourning the loss of their son and are hopeful that these findings bring closure to both families."

(The Associated Press, CBS News contributed to this report)Â