A Fox in the Night — Roy Hart

The ravaged, waterlogged body of a beautiful, rich widow brings Superintendent Roper into a convoluted case with as many facets as the human psyche.
Hannah Blezzard is a mystery. Behind the doors of her elegant home, no clues to the real woman exist - no legal papers or documents, only cryptic phone messages. Tampered evidence and a missing cop add up to a case larger than the sum of its parts.
But when a second, apparently unconnected murder occurs, Roper's keen eye is able to see deeper into the morass of human motivation to spot a grotesque picture of greed and the fine line between innocence and guilt.