Wake Up and Smell the Bees — Donald Dewey

Paul Finley Mysteries Book Six 

Private investigator Paul Finley receives a packet of old police reports from a former colleague. Most of the reports describe cases that have been squashed or sidetracked for power interests. One of them questions the accidental death of Finley's wife and daughter some years earlier. Before Finley can go back to the source of the reports, the man dies. What follows is a quagmire of a homicide dressed up as suicide, a fanatical religious group, an old-time gang boss, and Finley's gradual re-immersion in nightmares that he had thought overcome.