The more details I hear about Duncan, the more I hate him. This man is a sick bastard who NEVER should've been walking the streets to begin with. My favorite site to get info on Duncan is The Cellar. This blog has so much information on Duncan and his life.
His victim in 1980, when Duncan himself was but 16 going on 17, was a 14-year-old boy Duncan assaulted at random. Joseph Duncan raped the boy at gunpoint, tortured him with a cigarette lighter, beat him with a stick, and dry-fired the gun at him twice.
Duncan was a known sexual deviant since he was 12 years old. See Report from 1978 discussing Duncans crime. He brutally raped a young boy, tortured him and burned him... terrible, nasty things. Clearly the courts saw a big problem with this man because he was locked up for a long time.
In jail, he was the floor slut and dressed like a woman! He even had a pimp... Incredible. Steve Huff shares some photos of Duncan in drag... Look if you must :)