From Goodreads:

Book #1 in the Paul Turner series

While in Chicago, right-wing televangelist Bruce Mucklewrath is attacked and his daughter killed. Sensing a potential time bomb, and with Mucklewrath creating great pressure, the police brass assign the case to Detective Paul Turner whom they trust with sensitive matters. During their investigation, Turner and his partner discover that other right-wing bigots have been suffering odd attacks, and they begin to suspect a conspiracy of vengeance, perhaps even from the gay community. This is an uncomfortable thought for Turner, who is himself gay, but when Turner is attacked and his two sons threatened, he has to enlist the help of people in his close-knit neighborhood, as well as his contacts in the gay world, to find the solution in time.