Murder being once done
(Book)

When a young girl's body is found in a London cemetery and the local police, under the command of Wexford's nephew, are baffled, Wexford decides to brave his doctor's wrath and the condescension of the London police by doing a little investigating of his own. For the canny, tireless, and unflappable policeman is an unblinking observer of human nature, whose study has taught him that under certain circumstances the most unlikely people are capable of the most appalling crimes.