Olivia Reinhart used to be Ariel Benson, a girl whose father murdered her mother when she was 3 years old. She is told they have found her father's jawbone and think he was murdered at the same time. As she returns to the town she lived in before for her father's funeral she is confronted with questions of why her parents were killed, who took her to the Wal-mart and dropped her off, and was it someone they knew. As she begins to dig into the past, she stirs up too much and puts her own life in danger.
Great book for 7th and up.
Henry, April. The girl I used to be. Square Fish, 2017.