Cheater by Karen Rose

A shocking murder leaves an affluent retirement community reeling in this riveting, high-stakes second installment of the San Diego Case Files, from New York Times and USA Today bestselling author Karen Rose.
Death is not an unfamiliar visitor to Shady Oaks Retirement Village, which provides San Diego with premier elderly support from independent retiree housing to full-time hospice care. But when a resident's body is found brutally stabbed and his apartment ransacked, it's clear there's someone deadly in their community. Detective Katherine "Kit" McKittrick quickly discovers that Shady Oaks is full of skeleton-riddled closets, and most tenants prefer to keep their doors firmly closed to the SDPD.
A longtime volunteer at the retirement facility, Dr. Sam Reeves honors his late grandfather's memory by playing the piano for the residents regularly. So it shouldn't be such a surprise when Kit crosses paths with him during her investigation, after she'd avoided the criminal psychologist-and the emotions he evokes-for the last six months.
Sam's rapport within the retirement village proves vital to the case, and the pair find themselves working together once again-much to Kit's dismay. But she is determined to apprehend the shadow of death lurking around Shady Oaks...and equally determined to ignore the feelings she's developing for a certain psychologist.