I Is for Innocent

Sue Grafton’s I Is for Innocent returns private investigator Kinsey Millhone to a civil case built around the murder of Isabelle Barney. Isabelle’s former husband David was acquitted in criminal court, but her first husband, Kenneth Voigt, is pursuing a wrongful-death claim on behalf of their daughter. When the investigator preparing the lawsuit dies, Kinsey inherits incomplete files, conflicting witnesses, and evidence that does not fit the family’s settled account. The approaching trial gives her one week to determine whether David escaped justice or has become a convenient target.

Grafton structures the mystery around the difference between legal innocence and factual truth. Kinsey tests alibis, financial motives, old relationships, and the reliability of memories shaped by years of repetition. Her method remains practical and skeptical, yet the case resists a single emotionally satisfying suspect. The alphabet-series format supports a self-contained examination of how verdicts influence later testimony and how civil procedure can reopen a story without resolving it. Pressure comes from the deadline and from the possibility that every confident narrative has protected the wrong person.