The Girl Next Door by Patricia MacDonald

The affluent town of Hoffman, NJ reeled in disbelief when highly esteemed physician Duncan Avery stabbed his wife Marsha to death one spring evening. The two Avery sons turned their backs on their father but his daughter Nina never stopped believing in his innocence. Nina returns to Hoffman after his father is paroled. Her father has come home to reconnect with his sons and to find the murderer of his wife. Then her father is killed, and Nina must help find who killed her mother and her father. It's a book that will keep your interest all the way through. I highly recommend it. PatM