Two young black men were found dead in a river in Mississippi. The year was 1964, and many suspected the men died at the hands of the KKK. But this was the South in the 60s – the case was never solved. Decades later, filmmaker David Ridgen returned to Mississippi with the brother of one of the victims. What they discovered there cracked open a 40-year-old cold case and changed the course of history.Subscribe to VICE NewsFollow VICE News on TwitterLike VICE News on Facebook