On 4 August 1892, an elderly couple living in Fall River, Massachusetts were slaughtered with a hatchet. Their daughter, Lizzie was accused of the crime, tried and acquitted. Yet 'conventional wisdom' and Fall River society have always considered her guilty, asking the question, "If Lizzie didn't swing the hatchet, who did?" Now, after more than a century. Professor Masterton uses modern forensics and extensive research to answer that question convincingly.