In March 1964, a 35-year-old African-American woman named Johnnie Mae Chappell was walking along the side of the road in Jacksonville, Florida. Four white men were driving around listening to the local race riots on the radio. They had a gun on the dashboard. As they passed Chappell, one of the men leaned out the car window and shot her to death. As the police investigated, evidence began to mysteriously disappear, making it impossible to punish the men who admitted to committing the crime.