A onetime Burnsville nursing home assistant was charged Wednesday with sexually assaulting a mentally and physically vulnerable 70-year-old resident.

Isaac M. Aboki, 35, of Savage, was charged in Dakota County District Court with second- and fourth-degree criminal sexual conduct in connection with the assault at the Ebenezer Ridges Care Center on March 10. 

Aboki, who was fired by the home, remains jailed without bail ahead of a court appearance Thursday.

The woman has severe cognitive impairment, difficulty communicating with others and is paraplegic.

According to the charges and a separate investigation by the Minnesota Department of Health, a nursing home staffer told police that when she responded to a call light in the resident’s room, she found the door blocked from inside by a dresser.

The staffer pushed the door open a few inches and saw the resident on her back — her nightgown pulled up to her neck — and Aboki on top of the woman “in a sexual manner with one leg on the bed and his head in the crook of [the woman’s] neck,” according to Health Department documents.

Responding police officers saw white stains on Aboki’s pants. When questioned, he said he was helping the woman with washing her face, changing her diaper and putting on her nightgown. He said he had no sexual contact with the woman.

Evidence collected from sexual assault examinations on the woman and Aboki “supports the criminal charges,” a statement from the County Attorney’s Office read.

A guardian to the resident said the woman lost her appetite soon after the assault and “does not smile,” according to the Health Department.