Death In Good Company

Widowed mainstream attorney Martha Patterson finds herself frustrated by her recent retirement. When a former colleague offers her a volunteer job as a pro bono lawyer for West Brooklyn Legal Services, Martha eagerly looks forward to resuming her career.
On Martha's first day at work, she encounters one of her agency's clients, Wilma Oberfell, a patient with a history of psychiatric problems. Wilma's only words to her are "I don't know whom I can trust."
The next day Martha sees Wilma lurking outside her apartment building, but Wilma disappears before she has a chance to speak to her.
And almost immediately, Martha finds herself in the middle of a murder investigation when she stumbles across a body in the entrance of a deteriorating apartment building.
Martha is haunted by Wilma's words. Her unquenchable curiosity and sense of noblesse oblige lead her on an unexpected search for the truth behind the woman's death, in Gretchen Sprague's Death in Good Company.