Scavenger Tides by Susan Hanafee

When Leslie Elliott quits her public relations job to move to a small island in southwest Florida, her dream of becoming a mystery writer threatens to become a nightmare as buzzards lead her to a headless dog carcass and a human body rolls in with the summer storms and then disappears, only to re-appear and vanish again. Leslie's search for answers and her run-ins with the sheriff take her on a journey that involves a fisherman with too many secrets, a local couple struggling to survive in a millionaire's playground and dangerous men who will stop at nothing to protect their lucrative criminal activities.