- Brian Laundrie died by suicide, a lawyer for the man's family told Insider on Tuesday.
- Laundrie was the sole person wanted in connection to the killing of his fiancée Gabby Petito.
- The family's attorney shared his cause of death a month after the 23-year-old's remains were found.
Brian Laundrie — who was the sole person wanted in connection to the killing and disappearance of his fiancée Gabby Petito — died by suicide, a lawyer for the man's family told Insider on Tuesday.
Laundrie family attorney Steven Bertolino said that the 23-year-old's parents, Chris and Roberta, were informed that their son's "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.
Laundrie's remains were discovered on October 20 near his backpack at Florida's vast Carlton Reserve where his parents told authorities their son went for a hike on September 13 and never returned to their North Port home.
The FBI revealed a day later that a comparison of dental records confirmed that the human remains found at the wildlife preserve were Laundrie's.
North Port Police spokesman Josh Taylor previously told Insider that the remains discovered at the reserve, which connects to the 160-acre Myakkahatchee Creek Environmental Park, consisted of "bones."
Laundrie's initial autopsy came back "inconclusive," and his remains were sent to a forensic anthropologist to be analyzed, Bertolino has said.
His remains remains were found at a location Laundrie's parents had "advised" authorities to search for him, Bertolino previously told Insider.
The feds issued an arrest warrant for Laundrie on a bank-card fraud-related charge in September and he was the subject of a massive FBI-led manhunt before his remains were discovered.
Laundrie disappeared nearly two weeks after he returned home from a joint cross-country road trip without Petito on September 1.
Petito's body was discovered at a remote campsite in Wyoming on September 19.
A coroner later determined her manner of death was homicide and the cause was manual strangulation.