Contract killings, missing witnesses, and the other ghosts of Greenville, South Carolina

The warning shots weren't enough to scare the county's top drug cop. The next shots scared a community for another four decades. Frank Looper's family looks back at a compassionate hunter and the warnings he ignored in a fight against organized crime.

Lt. Frank Looper might have changed Greenville, South Carolina forever. An honest cop surrounded by corruption and crime, he was on the verge of something big that might have shocked the southern mill city he called home. One day in January 1975 made sure Looper never had that chance. 

After four decades of secrets, a celebrated Southern city is reckoning with its dark past.