when gorton left, an officer rushed to the table, confiscated gorton's cup, and took it to the forensicse sample was tested immediately. >> dna is like any other biological molecule, subject to degradation. and one of the things that will degrade dna a little bit faster is a fair amount of heat. >> there were more than enough epithelial cells on the cup for testing but this caused problems. >> the initial dna analysis on the cup was a profile that showed a mixture. >> meaning that more than one person had used the cup. >> we had hoped that we would pick up dna just from the individual that drank out of the cup, but there was some indications that there was dna from more than one person there. >> but pcr dna testing showed a strong association between the dna on the cup and the biological evidence from the two crime scenes. and that was enough to get a search warrant for jeffrey gorton's home. there investigators found hundreds of women's undergarments, panties, and hose. they also found a disturbing videotape. a dry mouth can be a common side effect. that's why there's biotene. it comes