Akron police said it happened in October.
According to the police report, St. Clair visited the elderly woman on two consecutive days, both times sexually assaulting her as she lay defenseless and unable to speak.
"The victim was on a ventilator, unable to ask for help, or get help until later," Edwards said.
According to the police report, a hospital worker noticed the victim's blood pressure alarm going off as St. Clair was in the elderly woman's room.
The nurse saw St. Clair holding the victim's hand under the blanket, and noticed the patient appeared upset, the report stated.
Another nurse escorted St. Clair out of the hospital, as staff calmed the victim down, the report stated.
"The victim, through some basic questions, was able to converse to the nurse what actually happened that she was inappropriately touched by the neighbor guy," Edwards said.
Hospital staff immediately called police.
So, how did St. Clair get up to her in the ICU in the first place?
An Akron General Medical Center spokesman said St. Clair showed up during regular visiting hours and knew the victim.
The spokesman said patients can exclude some or all people from visiting them, but the victim did not request any restrictions on visitors.
Police said St. Clair has no prior criminal record.
"On the part of the hospital... they didn't do anything wrong," Edwards said.
Police said St. Clair posted bond and is currently free awaiting his first court hearing.
The elderly woman is out of the hospital, police said.