This book is a con. The stated murders are not what the book is about; they serve only to draw the reader in, then this horribly murdered family are forgotten. The characters are whiney; conversation is simple, petty and unfinished; communication is missing; there are many loose ends as the author decides to drop certain tangents to pick up others.
Not much in this story hangs together. The character are flat.
Skip this one if you can.