A Tennessee newborn kidnapped in a knife attack on his mother was placed in foster care with his three siblings after allegations arose that a family member tried to the sell the infant, sources familiar with the case said Monday.

Week-old Yair Anthony Carillo was recovered safely in Alabama Friday, three days after he was taken from his Nashville home. Soon after, the state took custody of the children away from his mother, 30-year-old Maria Gurrolla. An Alabama woman is in custody, facing federal kidnapping charges.