Casey, Jane (Jane E.). Maeve Kerrigan series

London defense attorney Philip Kennford's money provides a gorgeous house, a wardrobe worthy of Milan runways-- but it can't provide a happy marriage, or good relationships with his twin daughters. And it does nothing to protect his family when someone brutally murders his wife and daughter in their own home. When Detective Constable Maeve Kerrigan arrives at the scene, the two survivors-- Philip and his second favorite daughter, Lydia-- both claim to have seen nothing, but it's clear right away that this is an unhappy family accustomed to keeping secrets