Gacy lured boys and men to his house undetected for years, only to kill them. Most of his victims were male prostitutes, others Gacy had hired over time at his contracting company. None of the missing persons was very noticeable because the boys had often run away from home or led a nomadic life. Gacy himself saw his victims as scum and felt he had done the world a favor. 'John Wayne Gacy: Devil in Disguise' shows the full investigation of serial killer John Wayne Gacy and poses new questions about what may have happened and who else may have been involved.