. >> williams was charged with and tried for only two murders -- nathaniel cater and jimmy payne, both of the chattahoochee river. cater's body was nude, but his hair was caked with mud. >> digging through that silt, i was able to recover dog hair and fibers that were close to his scalp. >> the dog hair was consistent with sheba, the wayne williams family dog. in cater's hair was one of those unusual green carpet fibers. under a microscope, peterson could see the boomerang shape just like those in the williams carpet. this is a piece of that actual carpet which the fbi's harold dedman said was quite rare. >> it's got an unusual carpet fiber. it was manufactured a limited amount of time. it was a ten-year-old carpet. >> on jimmy payne, the other victim, dedman found yellow rayon fibers stuck to his cotton shorts, fibers consistent with the blanket under wayne's bed. >> i personally took the cutting from the yellow blanket that was under the bed. >> this evidence slide contains the yellow blanket fibers that dedman clipped that night, magnified by our own video camera. but when larry pet