Question: Is the documentary "The Bluffs Butcher" based on James Tillis, the boxer who was known as "Quick" due to his fast hand speed or Ron Stander, who challenged Joe Frazier for the heavyweight championship in 1972? 
Sentence (from "Ron Stander"): Ron Stander (born October 17, 1944) is a former professional boxer, who fought from 1969 to 1982.
Relevant evidence: Yes