Nursing Homes Are Murder (Paul Jacobson Geezer-Lit Mysteries)

Paul Jacobson, who suffers from short-term memory loss, becomes an undercover resident at a nursing home to help the Honolulu police track down a sexual assault perpetrator.
The police give Paul the names of three persons-of-interest and Paul begins investigating. None of the three appear suspicious.
Things go downhill when the woman who had been assaulted is found murdered.
Paul meets interesting residents, including a woman with synesthesia, a woman who eats soap, and a woman who races wheelchairs.
After another sexual assault, someone tries to smother Paul.
Interrupting a third attempted sexual assault, Paul figures out who the culprit is.
The bad guy tries to abduct Paul at gunpoint, but Paul escapes when a resident in an electric wheelchair runs into the bad guy.