ABCNews -- About an hour's drive from Lexington, Ky., is the Daniel Boone National Forest -- 700,000 acres of raw, rugged nature. It was here last month that the body of Bill Sparkman, a part-time census worker, was found bound and gagged and hanging from a tree. The word "Fed" was scrawled across his chest. "I couldn't believe it had happened," said Josh Sparkman, the victim's son. "I couldn't believe that anyone would want to harm my father, especially in such a brutal manner." Sparkman's death is still being investigated. It has not been ruled a homicide. But it's put renewed focus on what, for decades, has been the ugly side of this beautiful land. It's not the setting most people associate with the war on drugs. "Typically, in America today,...