State officials say they have acted to protect other patients following the pregnancy.
"None of the staff were aware that she was pregnant until she was pretty much giving birth", a source told KPHO.
Micheaels' comments came hours after Phoenix police served a search warrant to obtain DNA samples from male employees at the facility, the New York Times reported. "I haven't been able to sleep well at night because of what occurred here", a mother, Angela Gomez, told CBS.
The Phoenix Police Department declined a request to comment.
Parents of patients at Hacienda Healthcare have called this incident "deeply concerning" and are considering moving their children from the facility.
She added many people would have had access to the woman's room and cited a meeting with Mr Timmons in 1998 over concerns regarding the treatment of a separate patient.
According to Global News, the staff at the facility were unaware that the woman, who had been housed there for about 10 years, was pregnant.
Longtime CEO Bill Timmons resigned on Monday, a move backed by firm's board of directors, and the state's Department of Health Services said it would mandate the facility to operate under stronger guidelines for the time being.
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The state department of economic security dispatched a team to conduct health and safety checks at the facility, and the department of health services has beefed up safety measures: more staff, increased monitoring and stronger security.
A Hacienda board member says the facility "will accept nothing less than a full accounting of this absolutely horrifying situation". Her identity hasn't been reported, and it's not known if she has family or a guardian.
Another statement said Hacienda is "already conducting a comprehensive internal review of our processes, protocols, and people to ensure that every single Hacienda resident is as safe and well cared for as possible".
"Trust has been severed, period", she said.
The new mom and baby boy are reportedly both in good physical health. 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.
"We don't know who this person is yet".
"I wasn't there. I clearly don't have firsthand knowledge of what happened", Meyers said.
INSIDER also uncovered state records of two other disturbing reports at the facility.