Because of you

She's a 24 year old girl who is in college for criminal justice. Her parents were murdered at a young age. The murderer hasn't been caught. The mystery drives her mad. She thinks too much about her mother and begins to harm herself. A young, handsome detective with a past is chosen to help her. He doesn't know about her past but soon finds out about her parents death. The murder comes back and ... does he take her? Does he kill her grandparents?