CHICAGO—A North Carolina man who moved to Chicago was one of the victims of John Wayne Gacy, who was convicted of killing 33 young men and boys in the 1970s, authorities said Monday. Francis Wayne Alexander would have been 21 or 22 years old when Gacy killed him sometime between early 1976 and early 1977, Cook County Sheriff Tom Dart said at a news conference in announcing the identification of Alexander’s remains. In a statement, Alexander’s sister, Carolyn Sanders, thanked the sheriff’s office for giving the family some level of “closure.” “It is hard, even 45 years later, to know the fate of our beloved Wayne,” Sanders wrote. “He was killed at the hands of a vile and evil man. Our hearts are heavy, and our sympathies go out to the other victims’ families. … We can now lay to rest what happened and move forward by honoring Wayne.” Alexander’s …