 Four years later, Slater moved to the Circuit Court of Cook County following that institution's formation.Duke Slater was an active booster and recruiter for the University of Iowa throughout his life.He recruited dozens of prominent African-American athletes to Iowa City, including Ozzie Simmons, Jim Walker, Emlen Tunnell, Earl Banks, Harold Bradley Jr., Nolden Gentry, Carl Cain, wrestler Simon Roberts, and many others.