For decades, the family of Robert Horton thought he had been killed by the notorious serial killer while hitchhiking through Chicago in 1972. But, following a tip, investigators found the man living in a small Montana town, making him the fifth potential Gacy victim found alive in the past two years. A man believed to be murdered by serial killer John Wayne Gacy was found living in Montana this year — making him the fifth potential victim found alive in the past two years. Investigators tracked down Richard Hutton in April after his sister submitted the missing man’s name as...