it meant that rocky wardlow had the smoking gun.at all he needed to do was to find the depositor of the semen. he is simply looking for a dna match. >> investigators obtained reference samples from 28 men who had some part in stacy stites' life -- acquaintances, friends, coworkers. >> not one of them is a match. not even her fiance, jimmy fennell. so the police are wondering, is there some other explanation? what if stacey had been cheating? could that be a motive for jimmy fennell to kill her? >> it's hard having the finger pointed at you. it's hard when they's saying yeah you killed stacey, your fiance, that you did because these reasons, these reasons you know but i kept my mind that i didn't do it. >> bastrop county sheriff's office. >> there is a recorded phone conversation in which a woman calls in anonymously and claims her son was having an affair with stacey. >> i think stacey was having a liai -- liaison, okay? i'm almost positive of it. >> i mean, we've all kind of assumed that. >> who has the -- a motive for this? >> wel