The baby girl looked like a porcelain doll and appeared to be in shock, Greenwood Police Chief Greg Hallgrimson said.
"It's like I have been saying over and over again, a wall can prevent these types of heartbreaking stories, once people know they can't get in. They're not going to come."
"Border Patrol agents took every possible step to save the child's life," Customs and Border Protection spokesperson Andrew Meehan said.
U.S. Border Patrol said the girl was in Immigration and Customs Enforcement custody while authorities try to find her mother.
Rosa Maria Da Cruz's partner and three children were apparently unaware of the baby's existence.
The 13-year-old girl was kidnapped on Monday as she waiting for family members to drive her to school.
The girl claimed James Mealey told her to remove her clothes before he had intercourse and oral sex with her.
The man was allegedly caught posting an advert seeking a girl to facilitate his necrophilia and cannibal fantasies.
Authorities were investigating reports of a girl abducted near Public School 10 in Paterson.
The 13-year-old was reported missing after both of her parents were found dead inside their home.
Mohammed Imran, 24, was brought to justice after the murder of Zainab Ansari in January sparked multiple protests and riots.
The children were last seen in Live Oak, Suwannee County, Florida.
A day after the archbishop of Rouen called on a priest to confess his "inappropriate conduct" towards a young woman, the clergyman was found dead in church.
An attorney for the couple called the case "weak" and said the girl was lying about her living situation.
"He's got the maturity of an eight-year-old boy with the insecurity of a teenage girl. That's just who he is."
"For all parents please put socks on your children while trying new shoes on," Jodie Thomas, 26, said.