A Visible Darkness — Jonathon King

Tormented by the demons of his past, ex-cop Max Freeman rarely ventures beyond his secluded shack deep in the Florida Everglades. But he can't ignore the recent string of suspicious deaths of elderly, poor women that the police have been unable, or unwilling, to investigate. When his best friend urges him to get involved and act like the cop he's trying to forget he was, Max must confront the dangers of the city streets-and the unexpected shadows of his own past.