Who Killed My Daughter? The Unsolved Murder of Teenager Kaitlyn Arquette.In "Who Killed My Daughter?", a mother searches for the truth behind her daughter's tragic death.Eighteen-year-old Kaitlyn Arquette was the daughter of acclaimed mystery writer Lois Duncan. She graduated from high school on June 14, 1989, and had been accepted to the University of New Mexico. She planned to attend medical school one day. Shortly...