Vitali Klitschko, a Hall of Fame boxer and now Mayor of Kiev has been outspoken in his criticism of Putin. He is now on the front lines of the Ukraine territorial defense helping defend his country.
Klitschko is famous and has a lot of fans around the world. What he says has effect.
But Putin does not need him as a bargaining chip, he is not that significant politically. We believe that if Klitschko is caught and imprisoned, he will never emerge.