A crusade to find a killer becomes a gripping, intensely personal investigation into a shocking cold case and the radicalization of a terrorist. In September 2011, Erik Weissman and two friends were murdered in a brutal triple homicide in Waltham, Massachusetts. The case went unsolved for months and then years, with no discernible leads. Erik's friend Susan Zalkind, an investigative journalist, needed closure and knew that finding it would be up to her. As Susan began digging, and as the Boston Marathon bombing exposed startling new leads, the case led her down a tangled and sometimes dangerous path to the truth. With every person Susan interviewed came a new thread. She followed each one through a web of conspiracy theories, corruption, and crime until she eventually arrived at a decade-defining act of domestic terrorism. A true-crime memoir and the culmination of more than ten years of reporting, The Waltham Murders is an in-depth probe into a dark American underworld by a journalist coming to grips with both personal grief and the collective anguish of a nation in her tireless pursuit of the truth.