Who is John Gacy from Whoever Fights Monsters and what is their importance?

John Gacy appeared to be upstanding member of his community in Chicago. He was a member of the Democratic Party, and he even met Mrs. Carter when she was in town. Despite appearances, however, Gacy was a seriously deranged killer. He would lure young boys back to his house where he would rape and kill them. He would then bury them in his basement. Police found thirty-three bodies in his basement. He was later executed for his crimes.