She was Dying Anyway

Private Investigator Zachary Goldman took on the case as a favor to his ex-wife, Bridget. It should have been cut and dried. But the deeper he looks into the death of cancer patient Robin Salter, the more convinced Zachary becomes that Bridget's suspicions were correct. Bridget is determined to discover what happened to her friend… and what was thought to be death by natural causes becomes an active police investigation.
No one else wants Zachary involved in the investigation, not the police, Robin Salter's family, or her boyfriend. No one but Bridget. What does it really matter, when Robin was dying anyway? Facing a wall of silence, Zachary digs into Robin's past, determined to find the truth.