"As investigators brought out the bagged remains of several dozen young men from a small Chicago ranch home and paraded them in front of a crowd of TV reporters and spectators, attention quickly turned to the owner of the house. John Gacy was an upstanding citizen, active in local politics and charities, famous for his themed parties and appearances as Pogo the Clown. But in the winter of 1978-79, he became known as one of many so-called "sex murderers"...