Showing Friends in High Places by Donna Leon

When Commissario Guido Brunetti is visited by a young bureaucrat investigating the lack of official approval for the building of his apartment years earlier, his first reaction, like any other Venetian, is to think of whom he knows who might bring pressure to bear on the relevant government department. But when the bureaucrat rings Brunetti at work, clearly scared, and is then found dead after a fall from scaffolding, something is obviously going on that has implications greater than the fate of Brunetti's apartment ...