The 29-year-old woman had been a patient at the Phoenix facility for more than a decade after nearly drowning, according to azfamily.com, two Meredith Corp. -owned TV stations that broke the story; police declined to provided NPR with details about their investigation.
Phoenix police say the matter is under investigation.
Azfamily.com, a news website for television stations KPHO and KTVK, first broke the news Thursday that a woman gave birth on December 29 at the Hacienda HealthCare facility, where staff was unaware that she was pregnant.
"Today, the San Carlos Apache Tribe (the "Tribe") learned of the tragic circumstances surrounding [redacted], an enrolled member of the Tribe".
She said CEO Bill Timmons, who resigned on Monday, told them not to report on an incident back in 1998.
Every male employee at a private care facility where a patient in a vegetative state gave birth last month is being DNA tested.
In a statement to CBS, Hacienda Board Executive Vice President Gary Orman vowed that Hacienda "will accept nothing less than a full accounting of this absolutely horrifying situation, an unprecedented case that has devastated everyone involved, from the victim and her family to Hacienda staff at every level of our organization".
In a statement, tribal officials said the woman was still in a coma when she gave birth. It's also unclear if staff members at the facility were aware of her pregnancy until the birth.
"Hacienda stands committed to doing everything in our power to bring this police investigation to a quick conclusion", the spokesperson said.
Karina Cesena says that her trust with Arizona's Hacienda Healthcare has "definitely been broken".
On its website, Hacienda HealthCare says it provides care for "medically fragile and chronically ill infants, children, teens, and young adults as well as those with intellectual and developmental disabilities".
Since the news of the incident broke, parents of patients at the Phoenix-based health care facility have come forward, expressing their concerns. The facility has up to 74 patient beds, according to federal records, while state records show that some patients have lived at the Hacienda facility for decades. In 2013, a male employee was found to have made sexually explicit remarks to patients, though no physical or sexual abuse allegations were made and the employee was sacked.
There is also "increased monitoring of the patient care areas, and increased security measures with respect to visitors at the facility". the health department said. "Whether it's an employee or someone from the outside, the facility has an obligation to protect residents".