Magen Rose Fieramusca, who was a friend of Broussard's, is being held in Travis County on two counts of kidnapping and one count of tampering with a corpse, according to the Travis County Sheriff's Office. She is being held on $600,000 bond, and will reportedly be in court in February.
Broussard and her infant daughter, Margot Carey, vanished December 12 after Broussard dropped her son off at an elementary school.
An arrest affidavit for Fieramusca reveals that she said she was pregnant at the same time as Broussard. She convinced friends and an ex-boyfriend that she had given birth before trying to pass off Broussard's child as her own, according to an affidavit.
It's unclear if she was faking her pregnancy, or if she ever was actually pregnant.
Fieramusca told investigators that she had given birth at a birthing center in The Woodlands, an area north of Houston, on December 12 and brought the baby home the same day. When questioned by investigators she could not recall the name of the center, the affidavit said.