Infant Yair Anthony Carillo and three siblings were no longer in foster care and authorities do not believe parents Maria Gurrolla and Jose Carillo were involved in the baby's Sept. 29 abduction, the Department of Children's Services and Nashville police said.
Gurrolla lost custody of Yair and his three siblings after the baby was found safe in Alabama. Two officials familiar with the case, speaking on condition of anonymity because they were not authorized to discuss it, said the state took the children after someone claimed a family member had tried to sell the baby.
A police statement says "significant unanswered questions remain" in the case, including why Gurrolla and her infant were targeted. Thomas Miller, an attorney appointed to represent the children, told AP that police informed child welfare officials Tuesday they had "cleared the parents of any wrongdoing."
Meanwhile, the Tennessee Bureau of Investigation has opened a probe into the release of confidential juvenile court records to news organizations for stories about the children being placed in foster care.
Attempts to reach Gurrolla and her family to comment on the children's return were unsuccessful Tuesday. The Associated Press has visited her home daily since the abduction and left notes seeking comment. Apparently the family has not lived there since the attack, and does not have a phone.
AP also could not locate Carillo for comment, but he told The Tennessean that it's been a long ordeal and hopes the family will be left alone.
The baby was found Friday, three days after he was abducted during a knife attack on his mother in her home. Gurrolla was briefly reunited with the infant Saturday before Children's Services put him and his siblings, ages 3, 9 and 11, in foster care for their safety. Department officials have declined to be more specific, citing privacy concerns for the family.
Tammy Renee Silas, 39, of Ardmore, Ala., was charged with kidnapping after authorities said they found the baby unharmed at her home about 80 miles south of Nashville.
Silas has not been charged in the attack on Gurrolla, who was stabbed several times and had a collapsed lung.
The investigation into the juvenile records being leaked to the media was requested by the Nashville district attorney and will look into whether the release impeded a criminal investigation, TBI spokeswoman Kristin Helm said Tuesday.
Officials familiar with the case told AP that the state took custody of the children after an allegation that a family member tried to sell the baby. Other news reports referred to case records and one outlet said it had obtained juvenile court records.
Helm said illegally releasing documents could lead to official misconduct charges against record-keepers.
Gurrolla told investigators that after she was stabbed, the attacker made a phone call and said in Spanish "The job is done" and the mother "was dying," according to court documents.
Silas, who remained in custody Tuesday, waived an initial hearing and has not yet appeared in court. She has given a statement to investigators, according to Tennessee Bureau of Investigation spokeswoman Kristin Helm, who declined to detail what she said.
Gurrolla told investigators she had never seen the woman who stabbed her. According to the arrest warrant, Gurrolla was targeted while she and a cousin, identified only as "JS," were running errands and visiting a state food assistance office.
A car that police said Silas rented was seen on a surveillance video following Gurrolla before the attack, and the car rental information led police to her home.
Police have not released a motive, but Silas' live-in boyfriend, Martin Rodriguez, told The Associated Press that she said she could not have children and wanted to adopt a child from a relative in Texas who was going to jail.