week. that was the longest search in the world. >> it was almost 2:00 p.m. when maintenance man ishmael strickland found the lifeless body of a boy. >> on the seventh day a maintenance man spotted a body tossed down into the woods behind a parking lot at a suburban office complex. >> the bank was fairly steep. >> medical examiner joseph burton had to hold on to a rope to get down to the scene. >> he had a ligature mark on his neck like if somebody had a ligature and they were behind you or off to the side behind you and they closed their hands or fists together and pulled the ligature, basically. >> in other words, killed from behind. >> most likely, yes. >> all right. let me place another sample on this side. >> state crime lab scientist larry peterson attended the autopsy. >> i can recall at one autopsy pulling a fiber off of one of the victims. it was a green carpet fiber and mounted the sample on the slide