Photo: Austin Police Department

Heidi Broussard and her infant daughter, Margot Carey

Austin, Texas, authorities said at a Friday press conference they are confident the body recovered Thursday evening from a Houston-area residence is that ofHeidi Broussard, the 33-year-old mother reported missing a week earlier.

At a press conference Friday, Austin Police Chief Brian Manley told reporters an autopsy was being conducted on the dead body believed to be Broussard, and that a positive identification is imminent.

“We do believe this is Ms. Broussard,” Manley said.

Broussard was reported missing Dec. 12 along with Margo.

“She was supposedly Heidi’s friend for a long time,” a family member of Broussard’s tells PEOPLE. “We’ve been knowing her for a long time.”

Details on how Broussard’s died were not immediately available.

Detective Brad Herries said at Friday’s press conference it was “a lead” that prompted police to search Fieramusca’s property Thursday evening, where it is said Margo was found alive and unharmed.

Magen Fieramusca.Courtesy of Humble Police

Magen Fieramusca

Broussard’s body was found in the trunk of a vehicle registered to Fieramusca, the prosecution spokesperson says.

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Fieramusca is being held on $600,000 bond, PEOPLE confirms.

Her arraignment was scheduled for Friday morning, but PEOPLE was unable to determine if she had entered a plea to the charges against her.

Hanley said during the press conference additional charges were likely as evidence was uncovered, and that detectives were still working multiple scenes between Austin and Houston.

He added: “We all prayed we would find Heidi alive. We do not believe that is the case.”

source: people.com