 By the mid-1990s, drug problems had begun to catch up to Hunter, evident to all after his victory over Buster Mathis, Jr., which was turned to a No-Contest following a positive drug test.Hunter would lose three fights in the last year and a half of his career, before retiring following a loss to Danish Heavyweight Brian Nielsen for the IBO version of the heavyweight title.Hunter returned to the sport in September 2005, working as an instructor and trainer at the Tru Boxing Gym in Hollywood.