Bluegate Fields

Inspector Pitt was shocked. The body was found in the filthy sewers of Bluegate Fields, one of London's most dangerous slums, but the dead boy was clearly from high society. And he had been violated before he was murdered. So vile a case was hardly a proper topic for drawing room conversation. But when the Waybournes, the boy's family, refused to answer the police's questions, Inspector Pitt began to wonder what secrets they were trying to hide. His wife and co-sleuth, Charlotte, was determined to find out--even if it meant tearing, down the facades of an oh-so-proper family....

This is #6 in A Charlotte And Thomas Pitt Novel series.