Authorities suspect that Clarisa Figueroa intended on raising Ochoa-Lopez's baby as her own after her 20-year-old son died of natural causes.
Let our news meet your inbox. The news and stories that matters, delivered weekday mornings.
Clarisa Figueroa then called an ambulance, claiming she went into labor at home and that the baby was not breathing, according to court documents. When Chicago Fire Department officials responded, Clarisa was holding the baby with the placenta and umbilical cord attached.
They were taken to Advocate Christ Medical Center, where Clarisa was examined and the baby was taken to the neonatal intensive care unit, the court documents said. Clarisa showed no signs that she had delivered a baby.
An obstetric technician in the labor and delivery unit cleaned blood off Clarisa's arms, hands and face while she was being treated, court documents said.
It wasn't until May 7 that police discovered Clarisa's possible involvement when they found Facebook messages between her and Ochoa-Lopez arranging a meeting on April 23, the day the pregnant teen was last seen.
Police eventually obtained a search warrant after DNA tests showed the baby was not Clarisa's, as she had claimed.
Department of Child and Family Services spokesman Jassen Strokosch told NBC Chicago that it wasn't until May 9 that a mandated reporter, someone required by law to report suspected abuse, notified the agency about the newborn.
DNA tests have shown that the baby boy is indeed Ochoa-Lopez's child and the newborn has been reunited with his family. The boy was named Yadiel, which is what his mother planned on naming him, according to a family spokeswoman.
Advocate Christ Medical Center said in a statement Tuesday that its thoughts and prayers were with the Ochoa-Lopez family.
"Our top priority is to provide the safest and highest quality care for the patients and communities we serve," the hospital said. "Out of respect for patient privacy and in compliance with federal and state regulations, we are unable to provide comment. We continue to cooperate with local authorities."
Doha Madani is a breaking news reporter for NBC News.