Phoenix police say a licensed practical nurse has been arrested on a charge of sexual assault in the impregnation of an incapacitated woman who gave birth last month at a long-term health care facility in Phoenix, Arizona.

Phoenix Police Chief Jeri Williams said Wednesday that investigators arrested 36-year-old Nathan Sutherland on one count of sexual assault and one count of vulnerable adult abuse.

Williams says Sutherland worked at the Hacienda HealthCare facility where the woman lived and had been providing care to her.

The 29-year-old victim has been incapacitated since the age of 3 and gave birth to a boy at the facility on December 29, 2018.

Employees said they had no idea she was pregnant. Court records say her last known physical was in April.

The family of the victim told ABC7 News that the woman, who was initially reported to be comatose, responds to sounds and is able to make facial gestures.

The statement said the woman does not speak but has some ability to move her limbs, head and neck.

CEO of the facility, Bill Timmons, resigned after news surfaced of the assault.