The Dark Side — David J. Sherman

Jack Murphy, ex-cop turned private investigator, moved to Los Angeles to get a fresh start. Three and a half years and hundreds of deadbeat dads later, Jack takes a case that forever changes his life. His attempt to locate a young girl forces him to confront unresolved, painful issues from his past--ones he had hoped would stay buried. His investigation nearly gets him killed, and reveals to him some of the darkest demons from the soul of the City of Angels.