Brian Laundrie's autopsy is inconclusive, Florida authorities have said, and the remains are now being sent to an anthropologist to try and determine how he died.
No manner or cause of death was determined, Fox13 reports.
According to a statement by the FBI, on Thursday, October 21, Laundrie, who had been a person of interest in the homicide of his fiancée Gabby Petito, was confirmed dead.
Dental records showed that the body discovered at a Florida park belonged to the 23-year-old fugitive, who had been at the center of a nationwide manhunt for five weeks.
The remains were found the day before in the Carlton Reserve, which is where Laundrie's parents told investigators he had headed to in mid-September - when he suddenly didn't return home.
The FBI said in its statement regarding the matter: "On October 21, 2021, a comparison of dental records confirmed that the human remains found at the T Mabry Carlton Jr Memorial Reserve and Myakkahatchee Creed Environmental Park are those of Brian Laundrie."
Per BBC News, authorities said the body was discovered in an area of the park that had recently been underwater. As reported by NBC News New York, the remains found that day were skeletal and included a skull.
Laundrie's personal items - such as a backpack and notebook - were found near his body.
The FBI was unable to determine Laundrie's cause of death and is now sending the fugitive's bones to an anthropologist, who will try to determine how he died, per Fox13.
"No manner or cause of death was determined, and the remains were sent to an anthropologist for further evaluation," Laundrie family lawyer Steve Bertolino told New York Post.
"Forensic anthropologists are called upon when the environment has ravaged or removed the soft tissue," Dr. Heather Walsh-Haney told WPBF News. "Soft tissue markers that the forensic pathologist would use."
"My understanding was it either open to the public on Tuesday or Wednesday, and Chris and Roberta decided that since it was open … they wanted to go and look for Brian by themselves,” Bertolino told NBC News on Thursday, October 21.
"After speaking with me, I told him that I wanted to notify law enforcement so that we would have no issue."