On the night of March 5, 1770, British soldiers fired into a crowd gathered in front of Boston's Custom House, killing five people. Denounced as an act of unprovoked violence and villainy, the event that came to be known as the Boston Massacre is one of the most familiar incidents in American history, yet one of the least understood. Eric Hinderaker revisits this dramatic episode, examining in forensic detail the facts of that fateful night, the competing narratives that molded public perceptions at the time, and the long campaign afterward to transform the tragedy into a touchstone of American identity.