The Somersville Bodies — David Osborn

When the bodies of a retired couple in a small town are discovered six months after their deaths, the local police chief, his lead detective, and the county coroner all rule the couple a shared suicide. One young woman police officer, however, suspects murder. Her dogged pursuit of the killer or killers against orders to desist eventually leads her to evidence that the deceased couple were silenced to cover up a major scandal at the state capitol and to a terrifying shoot-out when she finally runs the killers to earth.