>> and ed knew exactly the time steve went to work because their shifts overlapped. how would he get into the house, though? there was no sign of forced entry. >> well, this is little old woods cross, you know, back in 1980. a lot of people didn't lock their doors back then. there was no forced entry. we don't know the if the door was locked for sure when steve left for work that night or not. >> so he would have basically barged in on her and started an assault immediately. >> that's what we believe, yes. >> and created havoc as she fought back against him. >> yes. >> but why would he kill her? >> well, that would be the only way that he could be assured that the finger wouldn't be pointed back to him. >> but now, years later, the dna pointed directly at mr. owens. soon after detective benson informed owens of the case being reopened, ed left town. leaving nothing but a note behind for his wife patricia. containing things like bank account numbers. >> how do you explain behavior like that?