A judge on Monday found 22-year-old Samuel Onyenweaku guilty of the woman's Nov. 24 rape at the Amber Park Nursing Home.
A prosecutor says the woman died in February from an unrelated condition.
A nursing supervisor testified that she had tried to enter the resident's room, but the door was locked. When she finally opened it, she says she found the resident naked from the chest down and Onyenweaku in her private bathroom.
The Cincinnati Enquirer reports that Onyenweaku was convicted of rape, felonious assault and patient abuse.
He could face 20 years in prison when he's sentenced July 28.