Sept. 20 (UPI) -- The FBI on Monday searched the home where Gabby Petito and her fiancé lived with his parents as an autopsy on a body that could be her remains was expected to be performed on Tuesday in Wyoming.
Brian Laundrie's parents were questioned by FBI agents after they were escorted out of their home for a search to be conducted. Laundrie has been missing since Tuesday, when his family said he went for a hike in Carlton Reserve near Sarasota, Fla. Authorities searched the area over the weekend, but did not find him.
On Sunday, the remains of a body that matched Petito's description were found near Grand Teton National Park in Wyoming.
The FBI arrived at the Laundrie home in North Port, Fla., Monday with a search warrant and the parents were brought back inside after the probe for questioning.
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North Port Police said Laundrie is a "person of interest" in Petito's case and for the first time described it as a criminal investigation.
"Law enforcement agencies continue to search for Brian Laundrie," North Port Police Department spokesman Josh Taylor said, according to the Herald-Tribune.
The remains were found Sunday in a camping area in Bridger-Teton National Forest, on the eastern edge of Wyoming's Grand Teton National Park.
Authorities have not identified the remains as Petito's, but they said they are consistent with her description.
Dr. Brent Blue, the Teton County coroner, said an autopsy will be performed on Tuesday and the remains will undergo DNA testing, which could identify them.
The 22-year-old woman disappeared in August while on a cross-country road trip with Laundrie. The couple had been living with his parents in North Port when they set out on the trip through several Western states.
Petito's family has said they lost contact with her in late August in the area of Grand Teton National Park. Authorities said that when Laundrie returned to Florida on Sept. 1, Petito was not with him. She was reported missing on Sept. 11.
Police said previously that Laundrie was not cooperative with investigators.
The remains were found in an area where other visitors had captured Petito's van on video before she disappeared. The video was taken on Aug. 27.
