What is the author's tone in the nonfiction book, I’ll Be Gone in the Dark?

McNamara sensitively portrays the lives of victims of the Golden State Killer, and their relationships before the attacks. She illustrates the lives of troubled teenagers and their conflicts with parents, along with the painful trauma endured after the attacks by both victims and family members of those who were murdered. By narrating the events before and after the attack, McNamara conveys the horrifying transformation that occurs during and after the encounter, and how it changes the victims and their family member's lives.