Question: Who was once considered the best kick boxer in the world, however he has been involved in a number of controversies relating to his "unsportsmanlike conducts" in the sport and crimes of violence outside of the ring.
Sentence (from "Global Fighting Championship"): Fighters from around world on the roster include Badr Hari, Peter Aerts, Peter Graham, Dewey Cooper, Zabit Samedov.
Relevant evidence: Yes