This gripping true-crime book tells the haunting story of a teenager who may - or may not - have helped kill her parents.

Patricia Columbo began working for pharmacist Frank DeLuca in the 1970s, and the two soon entered into a sexual relationship against her father's wishes.

When Patricia's parents were brutally murdered along with her 13-year-old brother, police suspected Patricia's strange behavior and arrested both her and Frank.

The details revealed during their trial will horrify readers of this book, informed by extensive interviews with Patricia in prison.

Contains mature themes.