The 3 Tramps were...?
The Wikipedia article on the JFK assassination relates what Rolling Stone calls Hunt’s death bed confession that he was one of the 3 tramps.
“He acknowledged that CIA agent Frank Sturgis and he were the “tramps” who were photographed in Dealey Plaza, and held by the Dallas Police shortly after the assassination.[44]” — http://en.wikipedia.org/wiki/Kennedy_assassination_theories
And the Harrelson tramp really is reported to be related to Woody; but I believe there are conflicting versions on what the tramp Harrelson had said in regards to that.
Woody Harrelson's father was a professional Mob hit man who died in prison. His involvement in the Kennedy assassination is much-debated. My personal theory is that he was pulling the interviewer's leg; when you're serving life and don't get many visitors, you have to make your own entertainment.