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Texas – When she learned that Heidi Broussard’s water had broken, Magen Fieramusca jumped into her car and began the 165-mile drive from Houston to Austin. The two women had known each other for a decade, and Fieramusca wanted to be there when her “best friend” went into labor. She made it to the delivery room in time to hold Broussard’s hand and help her through her contractions, becoming one of the first people to hold newborn baby Margot Carey on Nov. 26.

Then, prosecutors say, she hatched a plot to kidnap her friend’s baby and pass it off as her own.

According to court documents released on Monday and first obtained by the Austin American-Statesman, Fieramusca, 33, had been nursing a fake pregnancy for months. Two weeks after Broussard’s friends and family gathered around her in the delivery room, the young mother vanished. Her body was later found stuffed in the trunk of a car behind Fieramusca’s home.

Fieramusca, whose attorney has asked the public not to rush to judgment, has been charged with two counts of kidnapping and one count of tampering with a corpse. Prosecutors say she could potentially face additional charges “up to and including capital murder.”

As The Washington Post previously reported, Broussard, 33, left home with 2-week-old Margot in tow early on the morning of Dec. 12. She dropped off her 6-year-old son at his elementary school, then returned to her Austin apartment complex. But when her fiance, Shane Carey, got home that afternoon, both Broussard and the baby were gone.