Five years ago, the FBI announced that it was reopening more than 100 unsolved murder cases from the civil rights era of the 1950s and 60s. The goal of the "Cold Case Initiative" was to try and mete out justice in what seemed to be racially motivated killings that were never prosecuted.

Not many 50-year-old cold cases ever get solved - memories fade, evidence is lost, witnesses and suspects die or disappear. But that's not the case in the death of Louis allen, a mostly forgotten, but historically significant murder that helped bring thousands of white college students to Mississippi in the Freedom Summer of 1964.