Not a happy family - Sharee Labina

About the book list a happy family by Shari Labina ... "Every member of this family hides a secret, especially... the dead. The Brecken Hill area located north of New York City is an extremely luxurious place. And to have a house there, you must be rich, very rich like Fred and Sheila Merton. But that enormous wealth they possess could not save them when the killer knocked on their door, and slaughtered them brutally and excessively on Easter night after a fierce argument with their three children at dinner. And although some contents of the house were looted, and jewelry stolen, it is a heinous and extremely brutal crime for their murder to be solely for theft. Who could do such a thing? And is it a theft crime in the first place? Or are there secrets in this family?"