Thompson confirmed the baby and his mother have been recovering in an area hospital following the birth.
San Carlos Apache Police Chief Alejandro Benally says Phoenix police "will do all they can to find the perpetrator".
While factors remain unknown, such as how far along she was, someone who is fed the same amount from a tube every day might not show any dramatic changes, like a swollen belly, said Dr. C. Kevin Huls, a clinical assistant professor and maternal-fetal medicine fellowship director at the University of Arizona College of Medicine-Phoenix.
Hacienda also cares for - it's got several programs to provide medical and therapeutic services for medically fragile infants, children and young adults.
Police said, the child is doing well.
A Hacienda board member says the facility "will accept nothing less than a full accounting of this absolutely horrifying situation".More news: Transfer: Sarri speaks on Chelsea selling Willian
More news: So many people get hurt in the bloody 'Punisher' Season 2 trailer
More news: Driver who crashed while blindfolded was participating in ‘Bird Box Challenge’
The case has drawn outcry from the governor to the San Carlos Apache tribe in southeastern Arizona, of which the 29-year-old victim is an enrolled member, and put the spotlight on the safety of group homes and facilities that care for those who are incapacitated or severely disabled.
Arizona Gov. Doug Ducey's office has called the case "deeply troubling".
The department of health ordered Hacienda to implement "heightened safety measures", spokeswoman Melissa Blasius-Nuanez said. They include more than one staff member being present during patient interactions and more scrutiny of visitors. It has multiple complaints going back to 2013, most for emergency preparation or Medicaid eligibility, according to the state's online complaint database for care facilities. A lot of them involve fire drill and evacuation preparation or Medicaid eligibility. That employee was later fired. Hacienda Nursing Facility is now rated 1 out of 5 stars for staffing, or much below average.
"There's a lot of information we do not have". "Whether it's an employee or someone from the outside, the facility has an obligation to protect residents".
"At this point, I don't know that anybody's been ruled out", he said. "If it's the same story from different people, then there's something wrong".
CNN is not reporting the woman's name because she is the victim of sexual abuse.
But sexual assault and rape are also about entitlement to women's bodies: Seeing us as vessels for the gratification that comes with sexualized violence. The woman has been in the facility for a decade after a near-drowning incident.
"I can't believe that somebody would bathe her daily for nine months and never know that she wasn't having a period, that she [was] growing in her midsection, that nurses weren't keeping track" of her weight, said the caregiver, whose identity was kept private by the station.