On October 1, 1991, Fran Gladden-Smith disappeared without a trace from her home in Princeton, New Jersey, and suspicion immediately turned to her new husband, John David Smith III. In a highly unusual move, the police allowed her family to be involved in the investigation — as long as they didn"t interfere with law enforcement. Over the next several years, Fran"s sister Sherrie Gladden-Davis played a deadly game of cat-and-mouse, tracking Smith and his activities across the United States. She could go where police couldn"t — and she dedicated herself to helping authorities get the evidence they needed to unravel the mystery of her sister"s disappearance. My Sister Is Missing is Sherrie Gladden-Davis"s harrowing account of the search for her sister"s killer, and the inspiring story of her extraordinary path to justice.